The weekly timetabled lecture, tutorial, workshop or practical work sessions approved for each unit or component of a course

The number of hours per week a student spends in class, eg in tutorials, lectures, workshops and practical sessions. Non-contact time is that devoted to private study, eg assignment preparation, skills practice, research and reading.

The length of time an absorbent is in contact with a liquid prior to being removed by the filter.

Disinfectants require a specific contact time to ensure that they kill the restroom germs. This is usually between five and ten minutes. It is important to plan your steps so the cleaners will have time to work.

The length of time water is exposed to a disinfectant (e.g., chlorine contact time).