Splitting up training hours

Bit of thought experiment / discussion point.

Everyone has a finite amount of time to train/ride (be that work commitments or just how much you can take). Is it better to do fewer long sessions or get more sessions that are shorter.

For example it’s easy to get a 45 mins work out in most week days and 1 decent weekend ride and still get adult tasks done. Other option is a couple of 90 min sessions and a weekend ride. Total time is similar but how it’s achieved is different.

Just a pondering I had in a boring meeting!