I thought maybe she's in a profession where they use the word 'excise' a lot and it was just habit that she used it.

Or...

She mentioned that it was her birthday last Saturday, which was the first time she said she'd pick up *maybe* because she was 'busy, busy, busy'  -  and now I'm thinking she just learned a new word on her birthday and needed to show that off to me.

LOLOL.