The Prophet ﷺ did istighfār more than seventy times a day

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."  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ: «وَاللَّهِ إِنِّي لأَسْتَغْفِرُ اللَّهَ وَأَتُوبُ إِلَيْهِ فِي الْيَوْمِ أَكْثَرَ مِنْ سَبْعِينَ مَرَّةً۔»