Energy conversion is Power integrated (added up)

So, say we convert energy to power at a constant rate of 10kW.

In 100 hours we convert a total of 1000kWh of energy (1000/100 = 10)

In 10 hours, 100kWh (100/10 = 10)

in 1 hour, 10kWh (10/1 = 10)

in 1min (1/60th of an hour), 0.1667 kWh (0.1667 / (1/60) = 10)

Every time we reduce the interval, we also reduced the divisor, so the result is the same, 10kW of power.

And that, fundamentally what integration is, it's every infinitesimally small chunk added up. However small that chunk is, as long as it is more than zero.

However, our brains and our language, unlike our mathematics, finds these concepts difficult to address. So, in everyday life we tend to lump things into standard sized chunks, chunks that are able to be realised and imagined on a human scale.

For example, we often describe the velocity of an object in Miles Per Hour. Here, we have chosen a convenient and finite unit of time, that as humans we can articulate. It makes sense to use an hour, because for typical objects in everyday conversation, typical velocities result in sensible distances travelled over that hour. For example, your car might do 60 miles per hour, an fast train 100 miles per hour, or an aeroplane maybe as much as 600 miles per hour. In these cases, we use "per" as our spoken language avatar for the mathematical function of "divide"

In effect, these parameters become ratiometric, and as such, you can use a divisor of any magnitude and end up back at the same value you started with!