"in much less time" is correct and usable in written English.
You can use it when you want to express that a task or process can be completed in a significantly shorter amount of time than normal. For example: "With the right tools and know-how, I was able to assemble the bookshelf in much less time than I expected."
More Manageable Renovations By virtue of having a small house, any renovations can be done easy, quickly and in much less time than a full scale renovation in a larger home.
You feel Keatley today would make her points in much less time.
Even for large pipelines, construction for any segment is usually completed within six months and often in much less time.
Start a holiday exploring the Balkans by hopping off here in much less time than it would take to drive.
But teachers who use flipped mastery claim that its efficiency allows most students to do a year's work in much less time.
This should open to study objects that are one-tenth as bright as those detected before and do so in much less time.
With yoga, I get those effects in much less time--only 3-4 hours a week!
Similar as nested sparse sampling case, the authors in [8] proved that the estimates of all lags of autocorrelation R c (k T) could be obtained from these two sets of samples of the signal x c (t), both of the samples are taken at much smaller rates than Nyquist sampling rate, which results in a much less time consumption.
In particular, fathers spent much less time in transit on weekends, and mothers reported shorter time spent working on weekdays but longer time on weekends compared to NHAPS adults in the same age group.
Fear and loathing of the press is as old as the press itself, and the press would argue that the mighty in their seats have much to be fearful about; but the British tabloid press, in particular, spends much less time on the mighty, from day to day, than on the lowly, the lecherous, and the foreign.
Analysis of attentional states over a period of 30-s revealed that children with ADHD exhibit many more shifts in attention states and spend much less time in an on-task attention state than their peers [ 67].
