The Prophet ﷺ did istighfār more than seventy times a day
BUKHARI 6307:
from Abū Hurayrah —
I heard the Messenger of Allah ﷺ say, "By Allah! I seek forgiveness from Allah and turn to Him in repentance more than seventy times a day."
البخاري ٦٣٠٧:
عن ابو هريره —
سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ: «وَاللَّهِ إِنِّي لأَسْتَغْفِرُ اللَّهَ وَأَتُوبُ إِلَيْهِ فِي الْيَوْمِ أَكْثَرَ مِنْ سَبْعِينَ مَرَّةً۔»