time domain 

https://doi.org/10.1351/goldbook.08433
Condition in nuclear magnetic resonance spectroscopy where the independent variable of all functions is time.
Example:
The display of a free induction decay spectrum.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 708 [Terms] [Paper]