“What did you do this weekend?” “I worked in the yard, 'mostly'.” [=I spent most of my time working in the yard]
The people at the concert were 'mostly' older people. [=most of the people were older people]
He gets around 'mostly' [='mainly, chiefly'] by car. [=he usually uses a car to get around]
(..) lonely as a sparrow in the rain. I'm tired of never having me a buddy to be with... ...to tell me where we's going to, coming from, or why. Mostly, I'm tired of people being ugly to each other. I'm tired of all the pain I feel and hear in the world... ...every day. There's too much of it. (..)1999 The Green Mile
(..) Ahh. Hey, honey. How you feeling? Oh, not too bad. What did the doctor say? Oh, you know doctors. Gobbledygook, mostly. Gobbledygook. Having stew tonight. What are you doing? What does it feel like? Well, I know what it feels like. (..)1999 The Green Mile