/**
 * Counts the number of non-overlapping occurrences of a substring within a
 * string. Returns 0 when the search string is empty.
 * @param {string} string_ - Input string
 * @param {string} search - Substring to count
 * @returns {number} Number of occurrences
 * @example
 * countOccurrences("ababab", "ab"); // 3
 * countOccurrences("aaaa", "aa"); // 2
 */
export declare const countOccurrences: (string_: string, search: string) => number;