Collocations for unusual - adj.

appear, be, look, seem, strike sb as
become
consider sth, find sth
It was considered unusual for a woman to study medicine.

extremely, fairly, very, etc.
decidedly, distinctly, highly, most, particularly, truly (esp. AmE)
This is a highly unusual case.

relatively
a little, slightly, etc.
by no means, hardly, not at all
It's not at all unusual to feel very tired in the early months of pregnancy.

enough, sufficiently
The arrival of a taxi was unusual enough; an unknown woman getting out of it was sensational.

for
It's unusual for a woman to do this job.

in
The organization is unusual in several respects.

Unusual is used with these nouns:
angle, arrangement, aspect, case, circumstance, combination, degree, expression, feature, habit, incident, method, move, nature, occurrence, phenomenon, punishment, request, shape, sight, situation, smell, step, twist, variety