Shia Salih Mazandarani in “Sharh Usool al-Kafi” 11/88 said:

وإسقاط بعض القرآن وتحريفه ثبت من طرقنا بالتواتر معنى كما يظهر لمن تأمل في كتب الأحاديث من أولها إلى آخرها

Translation:

“Drop of part of Quran, and tampering of it is proven from our reports by tawatur al-maana, like it is apparent for those who will dip in books of ahadeth from the beginning till the end”

Tawatur al-manavi when there are lots of reports regarding one issue with different wording.

Tawatur al-lafzi, when lots of ways of transmission with the same wording.