I started 6yr ago. At first it was minimal-1-2d/wk, less in the winter. 4 yr ago, I became a regular. 2 winters ago on this forum, someone posted a monthly challenge in the winter months. The goal was to see if you could shoot for more days bike commuting and the prize was self satisfaction. Thanks to that challenge, I increased my riding to 3-4d/wk year round, with more frequent 4d/wk in the summer (I work 4d/wk).