How often Niantic update map in Pokemon GO? [closed]

Solution 1:

They don't have a set frequency for updating is the short answer.

According to a AMA that Niantic did the following question was asked:

Q89: mogu squad - I have edited OpenStreetMap because the roads were disappeared on the scanner by switching from Google map to OSM. When will the editing result be reflected in Ingress?

A89: We are still determining the update frequency.

The Source:

https://www.reddit.com/r/TheSilphRoad/comments/7jks3z/confirmation_that_osm_is_permanent_and_may/