The word "merit" seems to be used as both countable and uncountable, in both single and plural forms:
- "there is no much merit" — 23k results
- "the claim has no merit" — 57k results
- "the claim has no merits" — 3k results
- "there is a merit in" — 382k results
- "there are no merits in" — 27k results
Is there any subtle distinction? Say, when someone asserts that someone's claim (more specifically, a court motion) is baseless, which form of "merit" — countable or uncountable — is more appropriate?