zhù​yīn

phonetic notation

注音 zhù​yīn
phonetic notation noun
to indicate the pronunciation of Chinese characters using phonetic symbols such as Pinyin or Bopomofo, or the symbols themselves
Bopomofo verb
the specific Chinese phonetic system known as Zhuyin Fuhao, commonly used in Taiwan

Frequency

Written text
0.423 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)