When I listen to the music of Frederick Chopin, I seek diversity. I prefer not to hear 12 waltzes, or 17 Etudes (if he wrote that many). My preference is to get some of each.
In this recording there are 4 Nocturnes, but happily the other piece is the Piano Concerto #2.
Piano Concerto No. 2 in F minor, Op. 21, performed by the Sinfonia Varsovia, Christopher Warren-Green
Nocturnes (2), Op. 27
Nocturne No. 14 in F sharp minor, Op. 48 No. 2
Nocturnes (3) Op. 9
Nocturne No. 20 in C sharp minor, Op. post.
Performed by Maria João Pires (piano)
The recordings on this album come from Ms. Pires’ concerts in 2010 (when she performed the Piano Concerto in F minor op. 21 with the Sinfonia Varsovia orchestra under the baton of Christopher Warren-Green) and 2014 (when she performed a recital including, among other items, the Nocturnes presented here).
Here is Ms. Pires, performing the Fantasia Op. 49 by Chopin: