I am familiar with contraction of の to ん before です (and variants で, だ, でした etc) but I noticed that の is also contracted before 家 in spoken set-phrases like あたしんち and おれんち.
Are there any other instances where の is contracted before some particular nouns? I remember hearing おれんとこ in some anime/jdrama but I might have misheard.
Also, are there any dialects that utilize these types of contractions more frequently than the other colloquial dialects?
Chakoshi to the rescue! (Chakoshi is a tool for searching both the Aozora and conversational Japanese corpora at Nagoya University.)
A quick search for a "[noun]ん[noun]" pattern in the conversational corpus gives 262 results, most of which are what you are asking about. Broken down, there's actually not much variety in the nouns that follow ん:
とき (99): 高校んとき, 研修んとき, 外出んとき, …
とこ(ろ) (78): そこんとこ, こっちんとこ, 今んとこ, ほかんとこ, …
中 (62): 頭ん中, 山ん中, 電車ん中, …
ち (11): おれんち, おまえんち, 人んち, …
This contraction is present in both masculine and feminine speech. I can't think of any other phrases offhand that use ん this way, but I can't say that means they're not out there. If you can think of some, please put in a comment.
As far as dialectical variation goes, the Chakoshi corpus covers a fairly wide range of speakers, but I would have to do a deeper analysis on the results to find out if there are any trends.
