This is the 2451st most frequent Japanese word.
両方
"両方" means "both."
両方 is employed to specify 'both' options being considered.
彼は両方の選択肢を検討しました。
He considered both options.
Here, 両方 refers to the two specified books, emphasizing that the speaker has read both.
この2冊の本の両方を読みました。
I read both of these two books.
The word 両方 (ryouhou) is used here to indicate 'both' in reference to two unspecified entities that are being considered important.