The phrase "amount of time studying" is correct and usable in written English.
It can be used when discussing the duration spent on studying or learning activities.
Example: "The amount of time studying each week directly impacts a student's performance in exams."
Alternatives: "duration of study" or "time spent studying".
I do spend in inordinate amount of time studying cosmetics.
I spent an unreasonable amount of time studying it and then stepped back to get a better look.
The university is ranked as the eighth biggest party school, 12th for marijuana use and first for students spending the least amount of time studying.
We took the same AP courses, participated in the same amount of extracurricular activities and spent the same amount of time studying for our SATs and ACTs.
Recently, researchers have invested a considerable amount of time studying ways to improve energy consumption and pollutant formation in the overall cement manufacturing process.
In advance of his 2016 campaign, Perry also spent a considerable amount of time studying up on policy and brought on top conservative health care policy wonk Avik Roy to advise him.
"Whale skeletons are able to support life on the seafloor, even after a considerable amount of time," study author Diva Amon, a Ph.D. student at the University of Southampton in England, told The Huffington Post.
Egil Olsen, the Norway coach who has invested vast amounts of time studying chance creation, insists that in three out of four games the team who creates more chances wins.
A wise baseball wagerer will spend copious amounts of time studying the statistics of the game.
However, previous work has found a negligible relationship between the amount of time spent studying and academic performance (Nonis and Hudson, 2010; Masui et al., 2012), suggesting that the quality of studying techniques is also important.
And researchers admit that cramming for specific exams can help somewhat -- depending on the amount of time spent studying, the subject and the difficulty of the test.
