This is the 398th most frequent Indonesian word.
kerap
"Often" or "frequently."
The word 'kerap' is used here to imply a frequent habit of reading.
Dia kerap membaca buku di malam hari.
He often reads books at night.
Here, 'kerap' describes the frequency of rainfall during a time of the year.
Hujan kerap turun di bulan Desember.
Rain often falls in December.
In this context, 'kerap' highlights the regular occurrence of her paying attention to details.