間 a period of time

It CAN take a period of time of up to a day to go from one gate (門) to the other.

time ★★★★★
時 (time) + 間 (a period of time) = 時間 (time)

a mistake ★★★★★ 1/2 KANA
間 (a period of time) + 違 (different and therefore wrong) = 間違い (a mistake)

Verb form; 間違える！

xxx amount of time ★★★★★ SUF

xxx amount of time.

You can't just say "one year" like in English. You have to add 'kan', the equivalent of saying, in English, 'one year's time.'

for instance:

一年間 (いちねんかん）:one year's time

三週間 (さんしゅうかん）: three weeks' time

With months, it gets even more complex: you have to add 間 at the end AND ヶ (pronounced 'ka') in the middle, like this:

三ヶ月間 (さんかげつかん）: three months' time

human ★★★★☆ FP
人 (person) + 間 (a period of time) = 人間 (human)

make it in time ★★★☆☆
間 (a period of time) + 合 (to suit) = 間に合う (make it in time)

to make it in time - catching your train or not being late for class (this is the main time you use the "MA" pronunciation)