How old is 404 data from Google Search Console?

[McTaggart]

I was wondering how old the 404 data from Google Search Console actually is? Does anyone know over what kind of timespan their site 404s data is compiled over?

How long do the 404s tend to take to disappear from the Google Search Console, once they are fixed?

[Martijn_Scheijbeler]

Hi Luke,

It's a long time, unfortunately. Most of the 404 errors that I usually see in our Google Search Console properties are the ones that have been in there for ages. As you're dealing with bigger sites (+ 1 million pages) usually this is something you can't easily get rid of. For now I mostly tend to ignore them and try to focus on the crawl errors that come up during crawls via ScreamingFrog or Deepcrawl.

Martijn.