The phrase "update months" refers to periods of time during which something is being improved, changed, or made more current. It suggests a specific time allocated for making necessary updates or modifications. Full definition
The dataset is updated each month with a lag of just one month. (rba.gov.au)
Links are also updated each month on this home page. (hostessatheart.com)
Once the new feature update becomes available, your device will opt - out, and it'll continue to receive patches and security updates every month. (windowscentral.com)