Alright , thank you i thought that too
what is the maximum WIF missing characters that can be recovered ?
Pretty bad you have 19 missing characters from your WIF key it takes years decades before you can able to recover it and there is no maximum number of missing characters that you can recover 1 to 3 missing characters can be recoverable.
Why not try to recover it there is an easy tool to use for recovering base58 encoded strings such as WIF keys.
Check this link
The FinderOuter, a bitcoin recovery tool