When is 凝る pronounced こる vs こごる?


I encountered the following sentence

> ……ものすごく、凝っている！

in the context of a guy giving a boy a doll that the guy himself made
(outdoors in the winter, but that is probably not relevant).

I suspect that it is pronounced こる because こごる seems to be closely associated
with coldness and freezing, but how could I tell he wasn't for example frozen
stiff by holding out his hand out in the cold weather?




If there is no furigana attached to this, you can assume it is read as こる. I
didn't know this kanji can be read also as こごる and しこる. The verb こごる itself is
rare, and 凍【こお】る and
[凍【こご】える](http://dictionary.goo.ne.jp/jn/77872/meaning/m0u/) are far more
common.

Among the 59 results for 凝る in BCCWJ corpus, 58 were clearly こる. There was one
example about which I was initially unsure （「凝る雲の底を抜いて、小一日空を傾けた雨は…」）, but this
is an excerpt from an old novel, and it seems to be read as こる, too, according
to
[this](https://books.google.co.jp/books?id=FBngWnU3-xEC&lpg=PT272&ots=oudh9saVvH&dq=%E5%87%9D%E3%82%8B%E9%9B%B2%E3%81%AE%E5%BA%95%E3%82%92%E6%8A%9C%E3%81%84%E3%81%A6&hl=ja&pg=PT272#v=onepage&q=%E5%87%9D%E3%82%8B%E9%9B%B2%E3%81%AE%E5%BA%95%E3%82%92%E6%8A%9C%E3%81%84%E3%81%A6&f=false).




If there is no furigana attached to this, you can assume it is read as こる. I
didn't know this kanji can be read also as こごる and しこる. The verb こごる itself is
rare, and 凍【こお】る and
[凍【こご】える](http://dictionary.goo.ne.jp/jn/77872/meaning/m0u/) are far more
common.

Among the 59 results for 凝る in BCCWJ corpus, 58 were clearly こる. There was one
example about which I was initially unsure （「凝る雲の底を抜いて、小一日空を傾けた雨は…」）, but this
is an excerpt from an old novel, and it seems to be read as こる, too, according
to
[this](https://books.google.co.jp/books?id=FBngWnU3-xEC&lpg=PT272&ots=oudh9saVvH&dq=%E5%87%9D%E3%82%8B%E9%9B%B2%E3%81%AE%E5%BA%95%E3%82%92%E6%8A%9C%E3%81%84%E3%81%A6&hl=ja&pg=PT272#v=onepage&q=%E5%87%9D%E3%82%8B%E9%9B%B2%E3%81%AE%E5%BA%95%E3%82%92%E6%8A%9C%E3%81%84%E3%81%A6&f=false).

