I now have 60% left after a full day of heavy usage.

People had to save water for 4 days of usage.

The food supply, though, at our present rate of usage, will run out in five days.

For the first few hours of usage, I was in a typical office building.

The theory and the basis of their usage is still not well known.

Their most popular form of usage is to play basketball.

One example of such usage would be for cookie management.

"And from whom does one learn the subtle art of usage?"

The format has been a big success in terms of usage, so we're thinking about what more we could do with it.

This was simply a result of custom and usage rather than a specific decision.