I quilt at night for a couple of hours and I would say I could do a small pillow in a week. It all depends on how intricate the quilting stitches are. It takes me longer to do feathers and circles. Straight lines go quickly. Sometimes I mark and sometimes I just free hand. I have been making lap quilts 60 x60 and those take me about two months to quilt. I put a lot of stitches in mine.
Hope this helps.