Definition of core time in English:

core time

noun

British
  • [mass noun] The central part of the working day in a flexitime system, when an employee must be present.

    • ‘No, but they will be working shorter than the core time of part-time and full-time ordinary employees.’
    • ‘Garlick explained: ‘The college will be offering core time tutoring from 9am to 5pm every weekday, with fully qualified ICT tutors on hand to give in-depth training from beginner to expert level.’’
    • ‘But it also means you're going to have to give your core time to adapt to these new demands.’
    • ‘Our appeal for sponsors to help cover at least some of the core time spent in keeping Slugger running smoothly is coming on slowly but with some promising possibilities in the pipeline.’