Egyptologists such as Thomas Schneider, Michael Haase, and Rainer Stadelmann wonder if the compiler of the Turin Canon actually took into account that the cattle count was performed biennially during the first half of the Old Kingdom period, whilst tax collection during the 19th Dynasty was held every year. In sum, all these documents would prove that Khufu ruled for at least 26 or 27 years, and possibly for over 34 years, if the inscription in the relieving chambers points to a biennial cattle count. Indeed, if the compiler of the Turin Canon did not take into account a biennial cattle count, it could even mean that Khufu ruled for 46 years.