She did…regret the inferiority of her own playing and singing. She did most heartily grieve over the idleness of her childhood – and sat down and practised vigorously an hour and a half.
– Jane Austen
Emma, Chapter 27. Emma is not happy about her inferior piano playing compared to that of Jane Fairfax. This is after they both play at the Coles’s party. She is jealous of Jane’s accomplishment in music.