Riddle Solved: The English Word with Three Consecutive Double Letters

What English word has three consecutive double letters?
This is a good one.
Three consecutive? Yeah. Double letters?
I think so. Right?
Yeah.
No, it’s not consecutive
because N, N, E, S.
There’s an E right there. Is it an E? E?
No, it’s T, E,
N, N, E, S,
S, E.
Three consecutive. Is this a riddle or is this. Yeah,
it’s a riddle. Yeah. Yeah. Okay.
It’s a letter riddle. It’s a word.
It’s a word riddle,
but there’s a word that has three consecutive double letters.
Three consecutive double letters.
The hint is this person is in a library. Huh?
This person is in a library.
This. What?
This person is in a library. Person. Yeah.
It’s a. It’s a job title.
I don’t know. This one’s tough.
Bookkeeper. Yes!
Oh, my god.
I got. I got one more.