Prophet seek forgiveness Astaghfar 100 times a day

Hudhaifah Radiyallahu 'anhu narrates that I was sharp tongued with my family;

 I said: O Rasulallah I fear that my tongue will take me to Hell. He said: Where has your seeking forgiveness gone? I undoubtedly seek forgiveness from my Rabb a hundred times every day.
 (Musnad Ahmad)