"years of formation" is a correct and usable phrase in written English.
It can be used to refer to a period of time during which a person or thing is being shaped, developed, or trained. Example: My grandfather often spoke about his years of formation in the military, where he learned discipline and leadership skills that he carried with him throughout his life.
The subject of Robotics becomes part of the Primary school curricula for all the five years of formation.
The New Mexico bluffs contained millions of years of formation and subsequent deformation, and were in an area which had not been visited by Leidy or Marsh.
For the 16 Cyg B system, only particles inside approximately 0.3 AU remained stable within a million years of formation, leaving open the possibility of short-period planets.
Primarily because of gravitational perturbations, most of the material was ejected from the belt within about a million years of formation, leaving behind less than 0.1% of the original mass.
However, because of the relatively small size of the bodies, the period of melting was necessarily brief (compared to the much larger planets), and had generally ended about 4.5 billion years ago, in the first tens of millions of years of formation.
Based on a network's years of formation, expectations from the networks with different ages vary (e.g. there are different expectations from networks with 1 3 years, 4 6 years, 7 10 years and beyond 10 years of formation), and evaluation criteria differ for networks with diverse ages [ 10].
We expend a tremendous amount of effort to verify that each ring from each tree we sample is dated to its exact year of formation.
We do this using a technique called crossdating, which helps us ensure that each ring is correctly dated to its exact year of formation.
The content of 14C in the lens crystallines was compared with the bomb pulse curve, and the intercept indicates the year of formation (Fig 1).
Tree rings were visually cross-dated (Douglass, 1941) to assign each radial growth increment to the year of formation.
Beginning from the Huaxia peoples, this was the initial incubation period to which the 2000 years' process of formation of the Han ethnicity can be traced.
