Noun
the state of demanding notice or attention
the act of insisting on something
Source: WordNetThird, consider the insistency of an idea. The insistency of a past idea with reference to the present is a quantity which is less, the further back that past idea is, and rises to infinity as the past idea is brought up into coincidence with the present. Charles Sanders Peirce
Remember that a noble logical diagram, once recorded, will never die; long after we are gone, it will be a living thing, asserting itself with ever-growing insistency. Willis Polk
the insistence of their hunger Source: Internet
the press of business matters Source: Internet
insistence on grammatical correctness is a conservative position Source: Internet