This bibliography is comprehensive in kairos as a rhetorical term and the trope or iconicity of time in rhetoric.
Carter, Michael. "'Stasis' and 'Kairos': Principles of Social Construction in Classical Rhetoric." Rhetoric Review 7 (1988): 97-112.
Crosby, Richard Benjamin. "Cathedral of Kairos: Rhetoric and Revelation in the 'National House of Prayer.'" Philosophy and Rhetoric 46/2 (2013): 132-155.
Sippiora, Phillip, and James S. Baumlin, eds. Rhetoric and Kairos: Essays in History, Theory, Praxis. Albany: SUNY P, 2002.
Sullivan, Dale. "Kairos and the Rhetoric of Belief." Quarterly Journal of Speech 78/2 (1992): 317-332.