1861 20 Nov. 64 To adapt the formula to a noon epoch, it is only necessary to change the signs of the odd time factors A, a, C, c, F, f, K, k, N, n, and Q, q.
1882 Mar. 581 The time-factor is one which we are bound to include in casting up our column of probabilities for the future intellectual equality of the sexes.
1976 M. Gordon & G. Gordon (1977) xxix. 198 He worked fast, conscious of the time factor.
2004 M. Abrahamson ii. 33 [She] explained that the time factor determines most of her dining decisions. To cook at home requires planning.