AWS Cognito keys rotation frequency

I am using Cognito JWKS URI https://cognito-idp.<Region>.amazonaws.com/<userPoolId>/.well-known/jwks.json to get public keys. In this service, it is a simple passthrough of the data from this URL to the client.

I want to add a cache there. In the documentation, it is stated that keys are sometimes rotated but I cannot find any information on how often this happens.

Is there any more conclusive information on how often these keys are rotated?