The phrase 'activity during which' is correct and usable in written English.
This phrase can be used when you are referring to an activity that occurs over a specific period of time. For example: I enjoyed the winter camp, an activity during which I made many new friends.
Aramin spent seven years in prison for militant activity, during which he renounced violence.
In fact, the only activity during which we report that our minds are not constantly wandering is "love making".
There followed a period of intense activity during which he wrote serenades and masses as well as operas.
If two parties, neither being a victim, engage in a mutually agreed activity, during which one is committing a criminal offence, the second party is liable to a charge of "aiding and abetting", or conspiracy.
Since the masturbating person is in sole control of the areas that are stimulated, the degree of pressure, and the rapidity of movement, masturbation is often more effective in producing sexual arousal and orgasm than is sociosexual activity, during which the stimulation is determined to some degree by one's partner.
Self-explanation is a constructive activity during which a person tries to make sense of new information by explaining it to him/herself (Chi 2000).
Well, the Harvard psychologists noted that, after sex, the two activities during which we are most fully in the present are conversation and exercise.
Hearing of his hospitalization, one citizen of Copenhagen speculated, "Most likely illness, nervous stress, and a sort of convulsive irritability have played a large role in his bitter and negative activities, during which he displayed to the entire world his face, marked as it was by hatred of humanity".
'Sex' is generally taken to refer to an act that is defined in terms of male orgasm, while the sexual activities during which many women have their orgasms are relegated to secondary status, referred to by terms like 'foreplay'foreplay
Bei-jen also often created activities that required students to interact with each other, instead of with her, such as activities during which students asked each other what animals they liked or disliked and then reported their partners' answers to the class.
Stair climbing and transitions between positions are activities during which high percentage of indoor falls occur [ 16].
