gistfile1.m

 NSCountedSet *nsCountedSet = [[NSCountedSet alloc] initWithArray:@[@"abc",@"abc",@"abc",@"abc",@"other"]];
        
        NSUInteger maxDublication = 0;
        NSUInteger actualCount = 0;
        
        for(NSString *s in [nsCountedSet objectEnumerator]) {
            actualCount = [nsCountedSet countForObject:s]; // unnecessary checking, I want just array/enumarator of amounts.
            if(maxDublication < actualCount) {
                maxDublication = actualCount;
            }
        }
        
        NSLog(@"Max dublication is : %lu", (unsigned long)maxDublication);