"frequently observable" is correct and usable in written English.
This phrase is typically used to describe an event, occurrence, phenomenon, or behavior that is frequently visible or perceptible. Example: The effects of climate change are becoming more frequently observable in our local environment.
From an objective point of view, participants frequently referred to observable behaviour such as seclusion, sedative injection and physical restraint.
Such clusters were observable more frequently at 12 h p.i. (data not shown) and they were distributed over the entire tumor although mostly the bacterial colonies were still in close contact to blood vessels.
A major difficulty in realizing any molecular design would be carrying out the driven motion rapidly and frequently enough to be observable against random Brownian motion.
This idea, that emotions were external and visible effects, also explains why the term "sensible" (meaning outwardly observable) was so frequently applied to the term "emotion" in 18th-century texts (Diller, 2010, p. 150).
In dermatology, the assessment of disease severity is frequently condition-specific and uses defined, observable parameters [54], [55], [56], [57].
Furthermore, the ameloblasts immediately proximal to the area of observable cell death were frequently immunoreactive for activated caspase-3.
Instead of seeking modified procedures from which the awkward, unobservable infinities had been banished, the thrust was toward devising prescriptions for calculating what observable processes could occur and how frequently and how quickly they would occur.
So-called latent constructs or, composites are frequently defined from normative concepts and need operationalization by several observable indicators.
This finding could mean either that some activities occurred more frequently than other activities or that some activities were just more observable than others.
