
...is a complex socio-economic ACTIVITY...
The Big Bang Theory Season 3, Episode 3

Now, try to increase
your alpha-wave ACTIVITY.
The Big Bang Theory Season 1, Episode 3

It's a laborious ACTIVITY
because I have to imagine what you need...
The Big Bang Theory Season 1, Episode 16

He's referring to an ACTIVITY
he has done before.
The Big Bang Theory Season 2, Episode 15

He's gonna go through that
ACTIVITY book in, like, 30 seconds, so...
The Big Bang Theory Season 6, Episode 24