calibration interval 

https://doi.org/10.1351/goldbook.08012
Time period between calibrations over which the performance of the measuring system may be expected to meet specified requirements.
Notes:
  1. Guidelines for the determination of calibration intervals of measuring systems are given in ILAC-G24.
  2. ISO 14532 refers to a period "between routine calibrations".
Source:
PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1003 (https://doi.org/10.1515/pac-2019-0819)