Flip the data point that you are presenting. Rather present the number of times the job (calculation) got done in the 'current' duration.

Idea should be clear from the mockup below, but queries welcome.

^{download bmml source – Wireframes created with Balsamiq Mockups}

Flip the data point that you are presenting. Rather present the number of times the job (calculation) got done in the 'current' duration.

Idea should be clear from the mockup below, but queries welcome.

^{download bmml source – Wireframes created with Balsamiq Mockups}