/** Record-owner analytics. Durations describe record creation, never recorded audio. */
export interface StatisticsQuery {
    accountScope: string;
    fromStamp: number;
    toStamp: number;
    timezoneOffsetMinutes: number;
    previousFromStamp?: number;
    previousToStamp?: number;
}
export interface StatisticsDetail {
    firstRecordAt: number | null;
    days: number | null;
    recordMin: number | null;
    recordCount: number | null;
    wordsCount: number | null;
    subjectCount: number | null;
    searchCount: number | null;
    viewCount: number | null;
    shareCount: number | null;
    recordMinIncr: number | null;
    recordCountIncr: number | null;
    wordsCountIncr: number | null;
    keywords: StatisticsKeyword[] | null;
}
export interface StatisticsKeyword {
    keywordId?: string;
    snapshotId?: string;
    text: string;
    /** Occurrences in the corpus; never substitute the number of matching records. */
    occurrenceCount: number | null;
    recordCount: number | null;
}
export interface StatisticsPoint {
    weekday: number;
    stamp: number;
    costSec: number;
}
export interface StatisticsRecord {
    uid: string;
    title: string;
    text: string;
    sendAt: number;
    costSec: number;
}
export interface StatisticsRecordPage {
    items: StatisticsRecord[];
    nextOffset: number | null;
}
export declare function statisticsDateKey(date: Date): string;
export declare function statisticsQuery(accountScope: string, month: string, now?: Date): StatisticsQuery;
export declare function statisticsDuration(seconds: number | null): string;
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