How many times did the library fail Hermione?

Question

Goblet of Fire Chapter 26

“There’s a way of doing it!” Hermione said crossly. “There just has to be!”

She seemed to be taking the library’s lack of useful information on the subject as a personal insult; it had never failed her before.

Half Blood Prince Chapter 18

Meanwhile, the Hogwarts library had failed Hermione for the first time in living memory. She was so shocked, she even forgot that she was annoyed at Harry for his trick with the bezoar.

If Half Blood Prince was the first time that the library failed Hermione, was the search for a method of breathing underwater in Goblet of Fire considered successful? In what sense? And if it was successful why does it say that the library had never failed her before, implying that it failed her now?

Or was Goblet of Fire not "in living memory" by the time of Half Blood Prince?

(Of course there's also the time in Philosopher's Stone that the library failed her when looking for Nicholas Flamel, although perhaps that doesn't count as a failure because she did eventually find him, albeit accidentally).

Answer 1

Hermione emerged from between the bookshelves. She looked irritable and at last seemed ready to talk to them.

“All the copies of Hogwarts, A History have been taken out,” she said, sitting down next to Harry and Ron. “And there’s a two-week waiting list. I wish I hadn’t left my copy at home, but I couldn’t fit it in my trunk with all the Lockhart books.”

I am not sure if this qualifies, because the library did have the book, but every copy was taken. However, if you are counting every time she simply failed to get her hands on a library book, then this will work.