"Professoriat" Natural Recordings by Native Speakers
The term "professoriat" is not a commonly used word in the English language. However, I believe you may be referring to the "professoriate."
The professoriate refers to the collective body of professors, associate professors, assistant professors, and instructors in a university or college. It encompasses the entire academic faculty, excluding lower-ranking staff.
In other words, the professoriate includes all the individuals with academic rank in a higher education institution, who have earned the title of professor or have a similar academic title.
In a broader sense, the term can also refer to the collective values, norms, and practices that define the role of professors in the academic community.