We counted that the Messenger of Allah ﷺ would say a hundred times during a meeting: "My Lord, forgive me and pardon me; Thou art the Pardoning and forgiving One". (Using translation from Abū Dāʾūd 1516)
إِنْ كُنَّا لَنَعُدُّ لِرَسُولِ اللهِ ﷺ فِي الْمَجْلِسِ الْوَاحِدِ مِائَةَ مَرَّةٍ يَقُولُ «رَبِّ اغْفِرْ لِي وَتُبْ عَلَيَّ إِنَّكَ أَنْتَ التَّوَّابُ الْغَفُورُ»