"in far less" is a correct and usable phrase in written English.
You can use it to express contrast between two things. For example, "He made far more mistakes than I did in far less time."
But "Watchmen" took in far less than Mr. Snyder's "300" from two years ago.
The two films together took in far less than the $45 million collected by "The Hangover," a comedy that opened in the comparable weekend in 2009.
So, faced with rivals who are younger, but also have put in far less time in elected office, Mr. McCain tries to make a virtue of his age.
— have been addressed and averted in far less time.
Now, he speaks about it in far less draconian terms.
Some are showing up in far less lofty environs.
Booms are typically followed by busts, usually in far less than 10 years.
Obama officials reported this episode to Congress in far less dire terms.
Some baseball purists are referring to it in far less lofty terms.
Nick goes into this conference in far less trouble than the other two.
Further studies show this preoccupation to occur in far less extreme circumstances.
