Noun
The reciprocal succession of things in time or place; the act of following and being followed by turns; alternate succession, performance, or occurrence; as, the alternation of day and night, cold and heat, summer and winter, hope and fear.
Permutation.
The response of the congregation speaking alternately with the minister.
Source: Webster's dictionaryThe path of least resistance and least trouble is a mental rut already made. It requires troublesome work to undertake the alternation of old beliefs. John Dewey
The alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed. Isaac Newton
As we take, in fact, a general view of the wonderful stream of our consciousness, what strikes us first is this different pace of its parts. Like a bird's life, it seems to be made of an alternation of flights and perchings. William James
Music is pleasing not only because of the sound but because of the silence that is in it: without the alternation of sound and silence there would be no rhythm. Thomas Merton
Quite often social contrariness and a generally pessimistic outlook are observed. Alternation between dependency and self-assertion is common. Susanna Kaysen
a trill is a rapid alternation between the two notes Source: Internet