The phrase "a two year interval" is correct and usable in written English.
It can be used to describe a period of time lasting two years between events or occurrences.
Example: "The study was conducted over a two year interval to assess the long-term effects of the treatment."
Alternatives: "a two-year gap" or "a two-year period".
The ONS' Wealth and Assets survey is a longitudinal survey, meaning that respondents are interviewed more than once, with around a two year interval in the case of this study.
Those papers reporting the price along a two year interval (e.g. 1995 1996) the most recent year was used to update prices.
Our data are based on only two post-treatment years of colonization and extinction, and, while the mean number of species in plots ended up being very close to that of the mean number of species in the surrounding habitat, this was still only a two year interval.
For molecular analysis, we obtained two separate blood samples collected at a two year interval.
1) Also a part of women age 40-59 go to mammography screening at a two year interval.
A previous study also found moderate levels of reproducibility during a two year interval (from 1989 through 1991), with a two year test-retest correlation of 0.59.
Except for a three year interval in the 1920's, this is the first year since 1915 that the Open has not been played at Forest Hills, home of the West Side Tennis Club.
Simulations of land-use changes were then performed from 2006 to 2031 at a five year interval; land-use based parameters were extracted from the simulated maps and transferred to MIKE-SHE/MIKE-11.
Using two similar aerial small-footprint LiDAR campaigns over a four year interval, spanning ca. 20 km2, and concomitant ground sampling, we constructed a model relating median canopy height and AGB at a 0.25-ha and 1-ha resolution.
This is why we hear that there is a six year interval between Frege's Begriffsschrift (1879) and Peirce's quantification theory.
In Whitehall II, there was an inverse social gradient in age-adjusted CHD incidence: Compared to their high grade counterparts, intermediate grade male civil servants were 1.25 times more likely to develop a new case of CHD in a five year interval, while low grade men were 1.5 times more likely.
