Scantiness, paucity (8)
I believe the answer is:
sparsity
I believe this is a double definition.
'scantiness' is the first definition.
(I know that sparsity is a type of scantiness)
'paucity' is the second definition.
(thesaurus)
(Other definitions for sparsity that I've seen before include "Low density" , "Scantiness" , "Shortness of supply" , "Thinly-scattered state" , "Thinness of occurrence" .)