fluctuate between

fluctuate between (someone and someone else)

to waver between choosing one person and another. I am fluctuating between Sam and Tony as my choice. The manager fluctuated between Mary and Sarah as the new assistant.
See also: fluctuate

fluctuate between (something and something else)

to move between one thing and another; to change from one thing to another. Things seemed to fluctuate between the very good and the very bad. The temperature in here fluctuates between too hot and too cold.
See also: fluctuate
References in periodicals archive ?
One individual's heart rate may fluctuate between 59 and 61 beats per minute (bpm), while another's may swing between 50 and 70 bpm.
The programwide credit enhancement floor will fluctuate between 1% and 4% of the face amount of outstanding ABCP with a floor of $50 million.
The program-wide credit enhancement floor will fluctuate between 1% and 4% of the face amount of outstanding ABCP with a floor of $50 million.