Every thing depends on your future goals, if you intend to earn money from those blogs and this is one of the primary reasons you have started them. Then you need to invest time and energy no matter what. See this phase as the investment phase, after all even brick and mortar companies and establishments take years to start earning a profit.

However if you are doing it for fun, then only post when you feel like it, don’t stress yourself too much or you will loose interest.