cover/cloak of darkness

[vkhu]

"He made his escape under the cover of darkness"

I hear people using "cloak of darkness" fairly often so I was wondering if I could replace "cover" with cloak in the above sentence.

If it really is possible then mind telling me which one is more frequently used? My teacher said in a multiple-choice question, if there is more than one correct answer then always go for the most commonly used word/phrase.

[bhaisahab]

"He made his escape under the cover of darkness"

I hear people using "cloak of darkness" fairly often so I was wondering if I could replace "cover" with cloak in the above sentence.

If it really is possible then mind telling me which one is more frequently used? My teacher said in a multiple-choice question, if there is more than one correct answer then always go for the most commonly used word/phrase.

It's possible to say "under a cloak of darkness" but "under cover of darkness" is more common IMO.