In my music theory instruction, we are taught how to utilize one nct between two chords in a chord progression (i.e. check voices for direct and hidden parallel fifths and octaves between chords on strong beats and make sure that the weak beat pitch doesn't create new parallels in between the two chords). However, I was not taught how to do so utilizing multiple melody notes (ncts & chord tones). What is the process and rules for doing so?
*Side note: I am familiar with the concept of counterpoint. However, I want to know the "rules" or practice in the context of Four-part Tonal Harmony. I.e. using major and minor scales, modern meters, cadences, and triadic harmony, Not four-part counterpoint.