He must have had sleepless nights worrying about where to find the £20.
I have just found the answer to my sleepless nights.
In any case, he should not have any sleepless nights about it.
I have had many sleepless nights over this particular matter.
I am sure that gives him little cause sleepless nights.
I do not regard this as an opportunity to take revenge for sleepless nights.
He has lived laborious days and spent sleepless nights in combating an organised conspiracy against law and order in that country.
Now it brings sleepless nightson top of the fears.