Unable to answer "What are the opening hours here?" – Elektro Frisch (Electrician) – https://osm.org/node/5039480228 via StreetComplete 61.3:

Elektro Frisch ist nicht auf dem Namensschild

Attached photo(s):
https://streetcomplete.app/p/320030.jpg
https://streetcomplete.app/p/320031.jpg