How do you pronounce 數九?

Q: How do you pronounce 數九? A: sou3 gau2, e.g.

數九 (sou3 gau2) — meaning, pronunciation, examples

數九 (sou3 gau2, shǔ jiǔ) — nine periods of nine days each after winter solstice, the coldest time of the year

數口 (sou3 hau2) — noun; numbers; maths; calculations; prize; conditions
數學符號 (sou3 hok6 fu4 hou2) — mathematical symbols
數尾 (sou3 mei5) — remaining balance (on a debt)
數據機 (sou3 geoi3 gei1) — noun; modem
數 (sou2) — (noun) 1. Math; (adjective) Mathematic; to count; to be counted as; to rebuke
數白欖 (sou2 baak6 laam5) — noun; Bak Lam is another form of speech presentation in Cantonese opera between…