This is one reason I like it that a lot of shows these days have shorter seasons. At 13 episodes per year, and including the occasional 2-parter or cliffhanger, it means the heroes only get into trouble roughly once a month on average, rather than every couple of weeks. Still implausible, but not quite as bad.
There's no reason why television time must equate to real-life time. TNG did it, but no need for a series season to amount to one calendar year.
Number of eps, length of season, any amount of time in-universe can be portrayed. It needn't be one adventure per week due to television air times.