كَمْ دَعَوْتُكَ
How many times have I called you!
This expression need not ask for a numerical count. It can express istibṭāʾ, the perception that an expected response is unduly late: the speaker has called repeatedly and is dissatisfied at the delayed compliance.
Kam naturally directs attention to count, so repeated summons can be emphasized and the wording acquire a reproachful force. This does not convert every occurrence of kam into this usage; a genuine request for a count remains possible.