Searching by year / Coins minted only in one year

I was reading the interesting details on this 1944 2 Francs: https://en.numista.com/catalogue/pieces1179.html and it made me wonder about coins minted ONLY in one year. Is there a way to search for this?

If I type "1944 -1943 -1945" it comes up with some, but also many others, which don't have 1943 or 1945, but do have 1944 somewhere on the page (eg the Bulgarian 2nd Lev coins which have the coat of arms featuring the date 1944).

If I try to put that phrase into the year field it comes up with nothing.