type FrequencySymbol = typeof frequencySymbols[number];
/**
 * Type predicate.
 * @param candidate The candidate to test.
 */
declare function isFrequencySymbol(candidate: any): candidate is FrequencySymbol;
/**
* All the Frequency symbols.
*/
declare const frequencySymbols: readonly ["THz", "GHz", "MHz", "kHz", "Hz", "mHz", "µHz", "nHz"];

/**
 * The object representation of a measurement.
 *
 * @template Unit The type of the unit of measurement.
 * @template Value The type of the value of the measurement.
 */
type Measurement$1<Unit extends string, Value extends number = number> = Number & {
    readonly value: Value;
    readonly unit: Unit;
};

/**
 * Represents a dimension measurement.
 * @template Units - The units of the dimension.
 */
type Measurement<Units extends string, Unit extends Units = Units, Value extends number = number> = Measurement$1<Unit, Value> & Alternatives<Units>;

/**
 * Represents a collection of alternative measurements for different units.
 *
 * @template Units - The string literal type representing the available units.
 */
type Alternatives<Units extends string> = {
    readonly [unit in Units]: Measurement<Units, unit, number>;
};

/**
 * A dimension is a map of units to creation functions.
 * Each function takes a number value and returns a
 * dimension measurement.
 * @template Units - The units of the dimension.
 */
type Dimension<Units extends string> = {
    readonly [unit in Units]: (value: number) => Measurement<Units>;
};

type Frequency = Measurement<FrequencySymbol>;
declare const frequency: Dimension<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;
declare const terahertz: (value: number) => Measurement<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;
declare const gigahertz: (value: number) => Measurement<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;
declare const megahertz: (value: number) => Measurement<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;
declare const kilohertz: (value: number) => Measurement<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;
declare const hertz: (value: number) => Measurement<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;
declare const millihertz: (value: number) => Measurement<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;
declare const microhertz: (value: number) => Measurement<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;
declare const nanohertz: (value: number) => Measurement<"THz" | "GHz" | "MHz" | "kHz" | "Hz" | "mHz" | "µHz" | "nHz">;

export { frequency, frequencySymbols, gigahertz, hertz, isFrequencySymbol, kilohertz, megahertz, microhertz, millihertz, nanohertz, terahertz };
export type { Frequency, FrequencySymbol };