Very simple and short question

quick question, in order to say for example, ten years of training do i say 十年間の訓練 or without the 間?
of course, i have more examples, 10 minutes of eating, 2 years of travel etc.
appreciate every answer, thank you

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I’m personally not sure, as I am new to this stuff myself, but if I remember correctly, both versions are correct. However, the one without 間 will sound more casual.

Again, I am new, so the best thing to do is to wait for a pro to approve or sue me :wink: