Thetis was a Nereid, a daughter of Nereus and Doris and so could prophesy, or shape shift as well she was the leader of her goddess sisters and could with them calm the sea or save sailors or those drowning - or doom them.
it is unknown
Hunting in the wild places or upon Olympus.
Demeter (mother of Persephone who spend half the year in Hades with her husband, giving us the seasons)
Athena spends most of her time helping those she finds worthy of her help.
if you go to Greek mythology or wiki it says Hestia didn't believe in myths, therefore she didn't spend any time in myths.
Pandora was not a god she was the first created human so of course most of her time was spent on earth
Hephaestus spend his younger years forging metal into lovely things for Eurynome and Thetis.
The Greek goddess Athena was one of the twelve Olympians who dwelt on Mount Olympus. Athena also frequently helped heroes on their adventures.
Hera was the goddess of the house-hold so I would think most of her time would be vigilating every Greek family for domestic bliss and discord.
Demeter is the daughter of Cronus ruler of the Titans. She is the goddess of the harvest and her daughter, Persephone is married to Hades. The mythological explanation for winter was that Demeter was sad for the three months her daughter was required to spend in the underworld with her husband, so the whole world mourned with her.
In Greek mythology, Athena, the goddess of wisdom and warfare, is often depicted as residing on Mount Olympus, the home of the gods. However, she is frequently associated with the city of Athens, which is named after her and where she is venerated as the protector and patron deity. Additionally, Athena is known to wander the mortal world, offering guidance and assistance to heroes in their quests.
To spend part of the year on Earth, while plants and animals grow - and then return to the Underworld and rule beside Hades during the winter and autumn season.