I think I found talking to you less frustrating, and I thought you were going to kill me.

To be fair, frustration's really not the usual response to that kind of thing.

Well you were also being incredibly strange.

Maybe it's an android thing? Sounds like they were kind of... made to be troops.

Yeah I'm getting that impression.

"What's android culture like? Is that an android thing, talking in single sentences a lot?"

"Sort of? Some of us are more talkative than others. 2B's usually quiet."

"Do you do stuff that's not fighting machines? How'd that happen, that you were made by moon humans and never saw the moon?"

"Not really, actually. Fighting machines the whole point of us. There are automated factories in orbit."

"Are you - happy like that?"

"Happiness is irrelevant. We have a duty."

"Is there a plan for when you're done? ...How long do you live, anyway?"

"When we're done the humans can come back from the Moon. We live until we break down."

"What happens to you then? What's the average time on the 'until you break down'? D'you still break down if you don't get shot or something? Do repairs not help?"

"Parts wear out over time. If you get them replaced or have a back up, you're okay. I don't think any YoRHa unit has reached a natural end to operational life yet."

"How long's it been?"

He looks at 2B.

Shrug.

"...How long are your years?"

Well, years are pretty easy to talk about once you have days, but come to think they haven't compared those yet. Smaller subdivisions are probably different - Sovereign Crossing has different ones from Tscher - but days seem a natural category assuming they also have a sun and stuff and not just a moon. 

Androids measure time in units of seconds! One second is the time it takes a cesium atom to vibrate 9192631770 times. A year is about 31.5 megaseconds, a day is 86.4 kiloseconds.

...she finds their local method much more suited to her.

She is going to guess androids are better at doing a lot of math in their heads than humans here are! Wonders if humans or mages can get it through practice.

Cesium atom?

Everything is made out of little tiny bubbles called atoms. Different kinds of atoms have different properties. Cesium is one kind of atom, and one of its properties is that it vibrates at a steady rate when you shine a laser at it.

She would like to know more about this! (Laser?)