Google News search results for “greasy scalp” will yield a huge number of results for the phrase “How to get your greasiest hair”.
But this search term has only been used in the last few years, and not in a very long time.
This article has been corrected to make clear that there is a misconception that the term “greasiest” refers to a hair type that is greasy and/or frizzy, and to include the “dry” option that is often used.