experimental study

time / hour / the hours or time when something happens

to spend, to consume / to waste, to squander

a lot / a majority

largely; mostly

experimental

experiment

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend