WordPress duplicate page question

Frustrating because it seems like it should be simple.

Client had a data snafu and a lot of merged pages in WordPress.

domain.com/king-2
domain.com/king

are going to the same page.

Client wants to redirect all the -2 pages to the non -2 pages

So:

domain.com/king-2 -> domain.com/king

How could i use .htaccess to set up a rule to do this for all -2 pages?

Thanks…