B1
mainly or most of the time
Dictionary examples:
I'm mostly quiet in class, except when I accidentally laugh at memes. (0.0)
My diet is mostly healthy, but chocolate doesn't count, right? (0.0)
I'm mostly good at cooking, except when the kitchen catches fire. (0.0)
In the smaller villages, it's mostly very quiet at night. (21.1)
Her friends are mostly Italian. (51.4)