Which of the following describes turbulence that occurs 1/3 to 2/3 of the time?

Intermittent turbulence is characterized by occurring at varying intervals, specifically around one-third to two-thirds of the time during a flight. This definition aligns with how intermittent turbulence embodies sporadic occurrences rather than being consistently present or happening occasionally.

In aviation, turbulence should be classified based on its frequency and duration during a flight. Continuous turbulence involves ongoing disturbance throughout the flight, which does not fit the specified range of one-third to two-thirds. Occasional turbulence implies a less frequent occurrence, happening less than one-third of the time, and slight turbulence refers to the intensity rather than the frequency of occurrence. Therefore, intermittent turbulence is the most accurate description of turbulence occurring within the stated time range.