This is the 367th most frequent Bulgarian word.
повечето
"Повечето" means "most" in English.
'Повечето' is used to refer to the majority of a group, in this case, 'хора' (people).
Повечето хора харесват лятото.
Most people like summer.
Here, 'повечето' specifies the majority from a defined group, 'от книгите' (of the books).
Повечето от книгите на този автор са интересни.
Most of the books by this author are interesting.
In this case, 'повечето' indicates the larger part of a measurable entity, 'време' (time).