Which of the following terms related to risk management represents the estimated frequency at which a threat is expected to occur?

Single Loss Expectancy (SLE) represents the monetary loss expected each time a specific threat materializes, not the frequency of its occurrence.

Annualized Rate of Occurrence (ARO) specifically defines the estimated frequency, expressed as a decimal, that a particular risk event or threat is expected to occur within a one-year period.

A safeguard, also known as a control, is a protective measure implemented to reduce risk, not a metric representing the frequency of a threat.

Exposure Factor (EF) is a percentage representing the amount of an asset that is likely to be damaged or lost if a threat materializes, not the frequency of the threat itself.