class FreqManager {
    #store;
    static getInstance() {
        if (this._instance === null) {
            this._instance = new FreqManager();
        }
        return this._instance;
    }

    constructor() {
        this.#store = {};
    }

    set(key, value) {
        this.#store[key] = value;
    }

    get(key) {
        return this.#store[key];
    }

}

window.freq = FreqManager.getInstance();