How often to scan rss feeds and make api requests to check for content updates?

Question

PHP

How often do regular rss clients scan feeds for updates?
Also, the question is what time of publication to indicate - which gave api / rss or at the time of receipt of the material?

Answer 1

As you please.
For me, it’s better not to do this more than once every 5-10 minutes, so that your ip is not banned for too frequent requests, but to have more or less up-to-date data.
And the time received through rss, you do not publish your material, but a link to the source.