What's the difference between Frigga and Freya?

Answer 1

Alot.
Freyja was Vanir and brought to the Aesir with her father Njord and her brother Freyr as hostage exchange after the war between the two tribes. Freyja was the goddess of lust, love, battle, magic and the battle slain. She was the most beautiful of the goddess and her name means Lady. She was one of the most important goddesses and Snorri alludes to her cult still being around when he was which was in the 1200's.
XXIV. "Njördr in Nóatún begot afterward two children: the son was called Freyr, and the daughter Freyja; they were fair of face and mighty. Freyr is the most renowned of the Æsir; he rules over the rain and the shining of the sun, and therewithal the fruit of the earth; and it is good to call on him for fruitful seasons and peace. He governs also the prosperity of men. But Freyja is the most renowned of the goddesses; she has in heaven the dwelling called Fólkvangr,[1] and wheresoever she rides to the strife, she has one-half of the kill, and Odin half, as is here said:

Fólkvangr 't is called, | where Freyja rules
Degrees of seats in the hall;
Half the kill | she keepeth each day,
And half Odin hath.

Her hall Sessrúmnir[2] is great and fair. When she goes forth, she drives her cats and sits in a chariot; she is most conformable to man's prayers, and from her name comes the name of honor, Frú, by which noblewomen are called. Songs of love are well-pleasing to her; it is good to call on her for furtherance in love."
~Gylgaginning
Frigga is Odin's wife, the mother of Baldr the most beautiful of the gods and slain by Loki. She is the goddess of home and hearth, and family matters. She is Aesir. She is said to know all and share nothing.
XX. Then said Gangleri: "Who are the Æsir, they in whom it behoves men to believe?" Hárr answered: "The divine Æsir are twelve." Then said Jafnhárr: "Not less holy are the Ásynjur, the goddesses, and they are of no less authority." Then said Thridi: "Odin is highest and eldest of the Æsir: he rules all things, and mighty as are the other gods, they all serve him as children obey a father. Frigg is his wife, and she knows all the fates of men, though she speaks no prophecy,--as is said here, when Odin himself spake with him of the Æsir whom men call Loki:

Thou art mad now, | Loki, and reft of mind,--
Why, Loki, leav'st thou not off?
Frigg, methinks, | is wise in all fates,
Though herself say them not!
~Gylgaginning
Both Freyja and Frigga have thier own halls in Asgard as well.

Answer 2

Frigg
by Micha F. Lindemans
As the wife of Odin, Frigg is one of the foremost goddesses of Norse mythology. She is the patron of marriage and motherhood, and the goddess of love and fertility. In that aspect she shows many similarities with Freya, of whom she possibly is a different form.
She has a reputation of knowing every person's destiny, but never unveils it. As the mother of Balder, she tried to prevent his death by extracting oaths from every object in nature, but forgot the mistletoe. And by a fig made from mistletoe Balder died. Her hall in Asgard is Fensalir ("water halls"). Frigg's messenger is Gna, who rides through the sky on the horse Hofvarpnir. In some myths she was rumored to have had love affairs with Odin's brothers Ve and Vili.

Freya
by Micha F. Lindemans
In Norse mythology, Freya is a goddess of love and fertility, and the most beautiful and propitious of the goddesses. She is the patron goddess of crops and birth, the symbol of sensuality and was called upon in matters of love. She loves music, spring and flowers, and is particularly fond of the elves (fairies). Freya is one of the foremost goddesses of the Vanir.

She is the daughter of the god Njord, and the sister of Freyr. Later she married the mysterious god Od (probably another form of Odin), who disappeared. When she mourned for her lost husband, her tears changed into gold.

Her attributes are the precious necklace of the Brisings, which she obtained by sleeping with four dwarfs, a cloak (or skin) of bird feathers, which allows its wearer to change into a falcon, and a chariot pulled by two cats. She owns Hildesvini ("battle boar") which is actually her human lover Ottar in disguise. Her chambermaid is Fulla. Freya lives in the beautiful palace Folkvang ("field of folk"), a place where love songs are always played, and her hall is Sessrumnir. She divides the slain warriors with Odin: one half goes to her palace, while the other half goes to Valhalla. Women also go to her hall.

Old Norse: Freyja, Friia

Answer 3

frigga was odin's wife and freya was a goddess in norse mythology.

Answer 4

http://www.goddessgift.com/goddess-myths/frigga-freya-goddesses.htm