Webster’s Revised Unabridged Dictionary · 1913
Fervency
Fer′ven·cy (·ven·sy̆), n. [Cf. OF. fervence. See Fervent.] The state of being fervent or warm; ardor; warmth of feeling or devotion; eagerness.
When you pray, let it be with attention, with fervency, and with perseverance. Wake.