All 3 Uses of

minutiae
in
Persuasion, by Jane Austen

The minutiae of the business Anne could not attempt to understand; even Captain Wentworth did not seem admitted to perfect confidence here; but that there had been a withdrawing on the gentleman's side, and a relenting on the lady's, and that they were now very glad to be together again, did not admit a doubt.†
Chpt 10 *

minutiae = small or minor details

She had a great deal to listen to; all the particulars of past sad scenes, all the minutiae of distress upon distress, which in former conversations had been merely hinted at, were dwelt on now with a natural indulgence.†
Chpt 21

what my brother Hayter had said one day, and what Mr Musgrove had proposed the next, and what had occurred to my sister Hayter, and what the young people had wished, and what I said at first I never could consent to, but was afterwards persuaded to think might do very well," and a great deal in the same style of open-hearted communication: minutiae which, even with every advantage of taste and delicacy, which good Mrs Musgrove could not give, could be properly interesting only to the principals.†
Chpt 23