a few years ago, I rode my bike to work at least 4 times a week. I had a 5 mi commute each way so it was pretty easy. then I worked at another office where the commute was doubled. however, the city streets to get from my house to downtown were dangerous, so I would bike sometimes and sometimes use a combination of public transportation and biking.
then I got a job with a 25mi commute each way, so I could no longer ride my bike
now I work at home, so I don't ride at all unless in the summer sometimes. I need to get back biking when it warms up. I still run outside 4 times a week tho.