Contributed by Jonathan Stevenson / If On Kawara’s monumentally quotidian work was about the objective significance of the simple passage of time, Robert Yoder’s may be, in turn, about the subjective importance of each passing moment however uneventful. “I Was the Other Conversation,” his solo exhibition of untitled paintings (and one beguiling wooden carving) now up at Frosch & Co., continues his discerning visual exploration of how, psychically, people live.