systematic sampling

https://doi.org/10.1351/goldbook.10062
Sampling in which individual samples are taken at equal intervals in location.
Notes:
  1. In a time series, the quantity giving the location is time.
  2. The starting point may be assigned randomly within the first stratum.
Source:
PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 412 (https://doi.org/10.1515/pac-2015-0605)