I don't understand the meaning of しばらく in this sentence


I was reading a story and I found this sentence (in the previous part of the
text the author wrote that a taxi driver had found someone and he had picked
him up):

ところが、しばらく走っているうちに、車の中がなんとなく寒くなってきた。

First of all I don't understand the meaning of しばらく.

Another structure that I don't understand is なってくる. Why did the author put くる
after なる?




I'm sure OP can look up things in a dictionary by him/herself.

While the usage may be slightly different to how you would normally see it
used (しばらく待ってください！ or しばらくの間使えないよ！ etc), the meaning here too is that of a
somewhat short time span.

"However, while/after driving for some time, the inside of the car became
(gradually) colder."




I'm sure OP can look up things in a dictionary by him/herself.

While the usage may be slightly different to how you would normally see it
used (しばらく待ってください！ or しばらくの間使えないよ！ etc), the meaning here too is that of a
somewhat short time span.

"However, while/after driving for some time, the inside of the car became
(gradually) colder."

