Frequency refers to the rate at which an event occurs, such as the number of times a particular phenomenon happens within a specific time period. In research, frequency analysis involves counting and recording the occurrences of certain variables or events to understand patterns and trends in the data. Frequency analysis is commonly used in fields such as statistics, psychology, and market research to analyze and interpret data. It can help researchers identify relationships between variables, detect outliers, and make informed decisions based on the frequency of certain events.