Question: How many times is the Great Sphinx referenced in ancient Egypt?
About the article "Great Sphinx of Giza", section "Names of the Sphinx".

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The Great Sphinx of Giza ( , ; literally: Father of dread), commonly referred to as the Sphinx, is a limestone statue of a reclining or couchant sphinx (a mythical creature with a lion's body and a human head) that stands on the Giza Plateau on the west bank of the Nile in Giza, Egypt.
The face of the Sphinx is generally believed to represent the face of the Pharaoh Khafra.
It is the largest monolith statue in the world, standing long, wide, and high.
It is the oldest known monumental sculpture, and is commonly believed to have been built by ancient Egyptians of the Old Kingdom during the reign of the Pharaoh Khafra (c. 2558–2532 BC). 
The identity of the model for the Great Sphinx of Giza is unknown.
Virtually all Egyptologists and scholars currently believe that the face of the Sphinx represents the likeness of the Pharaoh Khafra, although a few Egyptologists and interested amateurs have proposed several different hypotheses.
Numerous scholars, such as DuBois, Diop, Asante, and Volney, have characterized the face of the Sphinx as Black, or "Negroid."
Around 1785 Volney stated, "When I visited the sphinx...on seeing that head, typically Negro in all its features, I remembered... Herodotus says: "...the Egyptians...are black with woolly hair"..." Another early description of a "Negroid" Sphinx is recorded in the travel notes of a French scholar, who visited in Egypt between 1783 and 1785, Constantin-François Chassebœuf along with French novelist Gustave Flaubert.
American geologist Robert M. Schoch has written that the "Sphinx has a distinctive African, Nubian, or Negroid aspect which is lacking in the face of Khafre."
The Sphinx of Taharqo is a granite gneiss statue of a sphinx with the face of Taharqo, a Nubian pharaoh who was one of the Twenty-fifth Dynasty (about 747-656 BC) rulers of Kush who also dominated Ancient Egypt.
It is currently housed in the British Museum. 
Ancient Egyptian architecture is the architecture of ancient Egypt, one of the most influential civilizations throughout history, which developed a vast array of diverse structures and great architectural monuments along the Nile, among the largest and most famous of which are the Great Pyramid of Giza and the Great Sphinx of Giza. 
The Black Egyptian hypothesis is a hypothesis held by various authors and contested by others that Ancient Egypt was a Black civilization.
This includes a particular focus on links to southern African (Sub Saharan) cultures and the questioning of the race of specific notable individuals from Dynastic times, including Tutankhamun and the king represented in the Great Sphinx of Giza, and Cleopatra.
Since the second half of the 20th century, typological and hierarchical models of race have increasingly been rejected by scientists, and most (but not all) scholars have held that applying modern notions of race to ancient Egypt is anachronistic.
At the UNESCO "Symposium on the Peopling of Ancient Egypt and the Deciphering of the Meroitic Script" in Cairo in 1974, the Black hypothesis met with "profound" disagreement.
Most participants concluded that the Ancient Egyptian population was indigenous to the Nile Valley, and was made up of people from north and south of the Sahara who were differentiated by their color.