The phrase "fluctuation between" is correct and usable in written English.
You can use it when you are talking about a change in something that goes back and forth between two different points. For example: "The market prices showed a fluctuation between the highs and lows of the day."
The battle fluctuates, and at the point of fluctuation between the motion in water and the immobility of frost, strange and beautiful forms are evolved".
One hallmark of the minimally conscious state is a rapid fluctuation between levels of awareness.
Her life was always one of fluctuation between luxury and poverty, male protection and abandonment – the two, of course, not unrelated.
We show that fluctuation between phenotypes is not a distinguishing feature of multipotent cells.
These analyses reveal a fluctuation between volcanic, fluvial and lacustrine deposits during the Middle Pleistocene.
Kirkpatrick's easy fluctuation between inspector and warden supports the allegations of nepotism documented by the Prison Association elsewhere in this exhibit.
Higher fluctuation between these values in hydrolysis of penicillin G reflects higher impact of diffusional restrictions on this reaction.
In music, nothing is predictable but the fluctuation between such extremes: it was inevitable that the world-embracing ambitions of late Romantics like Mahler and the early Schoenberg would be followed and countermanded by the tiny epigrams of Webern.
The fluctuation between lithostatic (broken bold line) and hydrostatic (solid bold line) fluid pressure in the model of this study occurs at a temperature gradient of 20 °C/km.
By administering functional connectivity analysis, we planned to examine connectivity fluctuation between conditions, which could help to elucidate functional hierarchy of the pre-SMA and right inferior frontal gyrus.
The maximum triterpenoids production could be achieved by using static culture (oxygen limitation) with temperature fluctuation between 25 °C (for 10 h) and 10 °C (for 14 h).
