Frequency

Frequency is the average number of times a customer sees an advertising message within a given time period.

Definitions

According to Product Manager's Handbook by Gorchels (2nd edition),

Frequency. The average number of times a customer sees an advertising message within a given time period.

According to the Marketing Communications by Fill (5th edition),

Frequency. A media planning concept that refers to the number of times the target audience is exposed to a message within a campaign.