Adjust Permalink Base For Attachments

Hi there. I want to be able to rewrite (if possible) the base name for an attachement page for a post.

Here is an example:-

https://www.domain.com/photos/36/summer-vactation/attachment/beach-03/

https://www.domain.com/photos/36/summer-vactation/gallery/beach-03/

I want to change the attachment part to another word, rather than having the default way with “attachment”

I’ve tried looking through the rewrite.php file but it does not make sense.

I am not much of a programmer, so your help would be appreciated.

Thanks in advance.