Collocations for shorten - verb

considerably, dramatically, drastically, greatly, significantly
The course has now been shortened considerably.

slightly

by
His driving ban has been shortened by a year.

from, to
The waiting time has been shortened dramatically from eight weeks to just one week.

Shorten is used with these nouns as the subject:
odds

Shorten is used with these nouns as the object:
distance, duration, length, life, odds, period, sail, stay, stem, stride