sparsity

noun

1. (uncountable, usually)The property of being sparse; sparseness.

   “It is this duplication of facilities which is mainly responsible for the poor loadings experienced on the Midland & Great Northern line, apart, of course, from the general sparsity of traffic in Northern Norfolk, and the fenlands around the Wash.”

   “And an operation on a mixture of sparse and full matrices produces a sparse result unless the operator ordinarily destroys sparsity.”