Please see the Runtime section of the TV Contribution Bible:

The runtime should be the general duration of one episode.

When possible, please enter the runtime without commercial breaks (e.g. 43 or 22) instead of the runtime with commercial breaks (e.g. 60 or 30).

Runtime can be entered at both the series and episode level. For shows with variable runtime per episode it is better to enter the value for each episode instead of setting multiple values on the series. For shows with a consistent runtime, it's better to enter a single value on the series. Runtimes can then be backfilled to the episode periodically.

https://www.themoviedb.org/bible/tv#59f7403f9251416e7100002e

OK thank you