No day passed for the Prophet ﷺ without him praying two rakahs after Asr.
حدثنا حفص بن عمر حدثنا شعبة عن أبي إسحق عن الأسود ومسروق قالا نشهد على
ما من يوم يأتي على النبي ﷺ إلا صلى بعد العصر ركعتين
No references are available.
Bukhari, Prayer Times, chapter on what missed prayers and similar ones are prayed after Asr, no. 593, and Muslim, Travelers' Prayer, chapter on knowledge of the two rakahs the Prophet ﷺ used to pray after Asr, no. 835, from the hadith of Shubah, through this same route.