We calculate hours by estimating the average length of each recording, and then multiplying that number by the total number of recordings across all languages.
A ṣe ìsirò wákàtí nípa fífojú wo gígùn àkálẹ̀ ohùn kọ̀ọ̀kan, a ó wá fi ṣe ìlọ́po iye àpapọ̀ àkálẹ̀ káàkiri àwọn èdè.