This is the 17915th most frequent Russian word.
уходила
"Уходила" means "was leaving" or "went away" (past tense, feminine).
Here, 'уходила' represents a repeated past action (imperfective aspect) of leaving from home.
Она часто уходила из дома вечером.
She often left the house in the evening.
In this instance, 'уходила' is used to describe a process that was happening at a specific past moment.
Когда я пришёл, она уже уходила.
When I arrived, she was already leaving.
'Уходила' here indicates a habitual past action of leaving work to go to the park.