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I heard the use of 新しい回 to say "the last episode released" : do I understand
it right ? is it a common expression ?

I have some doubt because according to me the counter for episode is 話。
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2021-03-03T09:28:10.900
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2021-03-03T13:08:40.207
2021-03-03T13:08:40.207
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question
grammar counters
新しい回 counter use
Yes this is a valid expression. This 回 is a simple noun that means "episode
(of a TV program)", "inning (of baseball)", "round (of an experiment,
competition, etc.)", "show (of a movie/play/etc played at a theater on a day)"
and such. It's typically modified by 最初の, 次の, 前の, 新しい and 最後の. 最終回 is a common
phrase that means "the final episode (of a TV series)".

This 回 is not a counter because it's following 新しい, which is obviously not a
number.
CC BY-SA 4.0
2021-03-03T09:39:45.873
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2021-03-03T09:45:00.643
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5010
5010
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answer