The Arabic word for nine is تِسْعَة (tis'ah).. This word appears 4 times in the Quran.

94x
9️⃣

تِسْعَة

tis'ah

nine

أُعْطِيَ مُوسَى تِسْعَ آيَاتٍ.

Nine signs were given to Musa.