Hope I have read you Q correctly...

the VOR idents every ten seconds, the DME every 30. So you should
hear...VOR, VOR,DME, VOR, VOR, DME et seq. every minute.

The DME ident is higher in pitch than a VOR ident to aid your understanding.

If one item is failed but transmitting, you'll hear VORt where the t is
meaning "test". Or the ident might be changed to "test" or "tst". Either
way if it isnt what you expect to hear, dont use it for serious nav.

HTH

David