This is the 7298th most frequent German word.
gehalte
"Gehalte" in German means "contents" or "substance."
Here, 'gehalte' (form 'gehalt') means 'content' and refers to what is contained in something, in this case, within a book.
Das Gehalt des Buches hat mich zum Nachdenken angeregt.
The content of the book made me reflect.
In this usage, 'gehalt' refers to 'salary,' i.e., monetary compensation received for work.
Ich habe mein Gehalt gestern erhalten.
I received my salary yesterday.
'gehalt' signifies 'content' in terms of the composition ratio, here used scientifically to describe the proportion of blue in the painting.