Count occurrences of a string inside a string (C)

str_count.c

int str_count(char *string, char *delim) {
	int count = 0;
	int i;
	for (i = 0; i < strlen(string); i++) {
		if (strncmp(&string[i], delim, strlen(string))) {
			count++;
		}
	}

	return count;
}