'monotonous time' is correct and can be used in written English.
You can use it to indicate that someone is spending a long period of time in a boring, tedious, or dull situation. Example Sentence: After hours of monotonous work in the office, I needed a break.
A monotonous landscape at a monotonous time of year?
Underlying every significant discovery from fruit fly research – and there have been many, relating to almost every aspect of our own biology – is daily, monotonous time spent by scientists toiling over plastic dishes of conked-out flies.
The 28-year-old has endured a more monotonous time than most, having played the Open and the Canadian Open in the fortnight leading up to the US PGA.
Patients who have taken part in studies of rehabilitation exercises that incorporated monotonous timed auditory cues (using a metronome) following cerebrovascular events demonstrated improvement in gait and motor functions.
For this reason, we represent the consumer's patience as a monotonous time-decreasing function.
The first of those abuses being tackled is the monotonous and time-consuming task of time tracking and filing time sheets — a meta problem if there ever was one.
The tasks of pounding, winnowing and grinding are often tiring, monotonous and time consuming; output is estimated at 1 to 3 kg of sorghum or millet flour per woman per hour (see Box 45).
Girls love knowing it will not be monotonous spending time together.
All this time-gazing can become slightly arduous and the forward-back rhythm can become monotonous at times.
The game, monotonous at times, turned on a pair of pivotal half innings.
This design process is monotonous, expensive, time-consuming, and incapable of finding the optimum design solution.
