six cases of robbery/robberies

[Tan Elaine]

China Press said there have been at least six cases of robberies against money changes in Johor Baru since the start of the year.

Would it be correct if I used 'robbery' in place of 'robberies'?

Thanks.

 

[probus]

"Six cases of robbery" is correct. "robberies" is unidiomatic and wrong.