The phrase "time drain" refers to anything that consumes or takes away a significant amount of time, resulting in a loss of productivity or focus on more important tasks.
Sentences with «time drain»
A huge time drain when it comes to sorting out training, even if you're an internal training department, is sending emails! (elearningindustry.com)
Meanwhile the taps are putting a large amount at the same time the drain takes out the same quantity. (realclimate.org)
Add to that the meticulous preparation necessary to teach online, and you have a recipe for a teacher time drain. (edutopia.org)