The phrase 'unparalleled rate' is a correct and usable phrase in written English.
You can use it to refer to something that is happening at an unusually fast or efficient speed, compared to usual standards. For example: "The new computer system has been processing orders at an unparalleled rate, cutting down on wait times."
Around the Rocky Mountain West, from the Powder River Basin in Wyoming and Montana to the San Juan Basin in New Mexico and Colorado, and the Uinta and Piceance Basins in Utah and Colorado, energy companies are punching holes in the ground and erecting drilling platforms at an unparalleled rate.
In the last few decades, however, our understanding of the origin and ancient divergences of birds has advanced at an unparalleled rate.
Vancouver May 1 , 2002As the commercial center of British Columbia and one of North America's largest ports, Vancouver is a dynamic modern city that is growing at an unparalleled rate.
El Salvador is bleeding out, hemorrhaging human beings at an unparalleled rate for a country not at war.
This new spirit of collaboration, along with the scientific tools that are now available, has fueled an unparalleled rate of scientific discovery in breast cancer research.
Because of the unparalleled rate of decline, use of the FEV1/FVC ratio alone to diagnose COPD will over represent a COPD diagnosis when no such pathology may exist.
Since the late 1970's, following the end of Mao's disastrous experiments, China has done extremely well, experiencing unparalleled rates of economic growth.
They have endured unparalleled rates of racially based discrimination, marginalization, and exclusion from many aspects of mainstream life in Europe as a result of a rise in new forces of nationalism, racism, xenophobia, and other forms of intolerance (Petrova).
It's a scary world where, in some countries, overabundance of junk food causes unparalleled rates of obesity, while, in other countries, access to food is a daily struggle for large populations.
We further demonstrate that the high leaf vein densities unique to the angiosperms enable unparalleled transpiration rates, extending previous work indicating a strong correlation between vein density and assimilation rates.
Globally, averaged sea level has risen by almost 20cm between 1901 and 2010, a rate unparalleled in any period during the last 6,000 years.
