"fluctuating period" is a correct and usable phrase in written English.
It can be used to describe a time frame or duration that is constantly changing or experiencing ups and downs. Example: The company's profits were affected by the fluctuating period of economic recession, resulting in a decrease in overall revenue.
The effect of inclination angle was more pronounced in the fluctuating period.
Three different heat transfer regimes were identified in the transient period: conduction (0 < t < 0.4 s), quasi-steady (0.4 s < t < 10 s) and fluctuating period (10 s < t < 100 s).
During (a) the magnetically fluctuating period from 10 11 00 to 10 11 04 and (b) a quiet period from 10 00 00 to 10 00 04, both on 24 September 2008, presented in a coordinate system fixed to the satellite.
The spatial configurations and fluctuating periods of external source currents in the magnetosphere and ionosphere, the conductivity distribution features inside the Earth, and the locations of magnetic probes are all key elements for the measurement of induction effects within the Earth (Mareschal 1986).
Systemic Lupus Erythematosus (SLE) is characterised by fluctuating periods of minimal disease activity and 'flare'flare
Bipolar disorder is a severe psychiatric illness that is characterised by fluctuating periods of depression and hypomania/mania.
A number of other studies in different tumour lines reported fluctuating periods between 20 and 60 min (Dewhirst et al, 1996; Hill et al, 1996; Kimura et al, 1996).
The QBO components in zonal wind mingle with fluctuating short-period signals such as the annual variation in the MLT.
The evaluation of the recovery and the decreasing rates of fluid pressure using real observations is interesting because these rates may govern the fluctuating recurrence periods of the Tokai SSEs.
Additionally, the stock return also fluctuates through period 20 for FORTE, MOBIL, MRS, OANDO, and TOTAL after the initial positive responses (from MOBIL, MRS, and OANDO) and negative responses (from FORTE and TOTAL) in period 1, with standard deviation values 0.00046, 0.000066, 0.00145, 0.01108, and 0.00025, respectively.
But fast forward to the infancy of a new millennium, and these places exist in a strange purgatory, fluctuating between periods of disarray and regeneration: closed-down pubs and gastronomic renaissances, arts council initiatives and heroin epidemics.
