Hello.
I wonder if you could help with this issue...
I've learnt that you can count months/days duration like this:
"I've been there for one month/day"
そこには『一カ月/いちにち』いた。
but recently I incurred into other forms I hadn't heard of before:
ひと月(ひとつき)and 三日(みっか)for example.
I know that the latter usually indicates the third day of the month, not a three days period (so I used to think...)
So:
is there any difference between 一カ月 and ひと月 ?
and what about みっか and さんにち ?
is ついたち used in place of いちにち, too?
And what about the year?
When you say "(it took) one year", you use いちねん or いちねんかん ?
Thank you all for the explanations
... but ...
why this little katakana "ke": ヶ
I guess it's some sort of symbol, such as the one used to repeat a given kanji: 々
Is it used just for 一カ月 or not?
Well 箇 and 個 came first I think. 箇 being the more usual.
The little ヶis actually from one of the two on top of the 箇 kanji. So ヶ and ケ represent the look of 箇 (in simplified form) while ヵ か and カ represent the sound of 箇.