incessancy

plural incessancies

1. uncountableusuallyThe quality of being incessant; unceasingness.

   What troubled them was its incessancy.

   2003, Richmond Barbour, Before Orientalism: London's Theatre of the East, 1576-1626, page 68

   2 more examples

   Or chatter, with incessancy of tongue / Careless, if kind, or cruel, right, or wrong

   1794, Timothy Dwight, Greenfield Hill

   Most birds confine their song principally to the morning and evening hours, and if they do not do this entirely, they surely quiet down at midday, when scarcely a sound is to be heard, but not so the Yellow Warbler,–morning, noon, and night, he keeps it up, and the incessancy of his singing has become to be a matter of remark.

   1891, “Incessancy of the Yellow Warbler's Song”, in The Oölogist, volume 9, page 65