Student or Learner
at any rate
— used to indicate that something is true or certain regardless of what else has happened or been said
▪ This restaurant has the best food—or at any rate, the best pasta dishes—in the city. ▪ At any rate [=in any case], cooking with fresh ingredients makes everything taste better. ▪ It is possible that she was nervous. At any rate, her singing was still good.
Are "at any rate" and "in any rate" interchangeable only in the second example?
But can you say in any rate? I mean, in any case, in any event, I'm familiar with, but the question specifies in any rate, if I understand correctly. I would have thought this phrase could only be used with at.