What is another word for "duration of time"?

Another word for duration of time is time span, period, length, term, interval, span, stretch, timeframe, and extent of time, all conveying same idea of how long something lasts. Duration of time itself is somewhat redundant because duration already means length of time, but common synonyms include time period, length of time, amount of time, period of time, and span of time. In formal writing, you might say temporal extent, time interval, or time frame. In everyday language, you might say how long, time length, or length. For example, instead of duration of time for movie is 2 hours, you could say length of movie is 2 hours, time span is 2 hours, or period is 2 hours. In project management, duration of time is called elapsed time or time required. In roofing, Owens Corning Duration shingles imply long duration of performance. Other words include continuance, continuity, and lasting. Thesaurus lists length, period, span, term, stretch, and interval as closest. For example, duration of time for vacation is 7 days can be said as vacation spans 7 days, vacation period is 7 days, vacation length is 7 days. So another word for duration of time is period, length, span, term, or time span, with time span being most direct alternative phrase, and period being most common single word synonym.