二に回かい

Meanings

noun, noun which may take the genitive case particle 'no'

twice; two times

Used as a noun or with の to modify another noun, indicating that something occurs or is done two times.

〈時とき〉に二に回かいtwice per (day/week/etc.)
週しゅうに二に回かいヨガのクラスに通かよっている。
I go to a yoga class twice a week.
二に回かいに分わけて〈動どう詞し〉to do something in two installments/parts
支し払はらいは二に回かいに分わけて行おこなった。
I made the payment in two installments.
〈事こと〉を二に回かい繰くり返かえすto repeat something twice
先せん生せいは同おなじ説せつ明めいを二に回かい繰くり返かえした。
The teacher repeated the same explanation twice.
二に回かい目めの〈物もの・事こと〉the second (time doing something)
これは彼かの女じょとの二に回かい目めのデートだ。
This is my second date with her.

二に度ど
二回 and 二度 both mean 'twice', but 二度 is preferred in set phrases and more abstract or emphatic contexts (e.g. 二度と), while 二回 is the neutral choice for counting concrete occurrences.
一いっ回かい
一回 means 'once' and 二回 means 'twice'; they sit on the same counting scale for occurrences rather than being true opposites.

二に階かいN5
二回 (twice) and 二階 (second floor) are pronounced identically but written and meant completely differently, so context is needed to tell them apart.
三さん回かい
二回 means 'twice' or 'two times', while 三回 means 'three times'; the two are easy to confuse since they differ only in the numeral before 回.

Compound of 二 (two) and 回 (counter for occurrences).