It was impossible for these ladies and their companions—among whom Lily had at once distinguished both Trenor and Rosedale—not to pass, in going out, the table at which the two girls were seated; and Gerty’s sense of the fact betrayed itself in the helpless trepidation of her manner.
There are no more uses of "trepidation" in the book.
Show samples from other sources
She began her first day at the new school with some trepidation.
I’m feeling something between normal trepidation and excessive test anxiety.