The phrase "increases at the same time" is correct and usable in written English.
It can be used to describe two or more things that are growing or rising simultaneously.
Example: "As the population grows, the demand for housing increases at the same time."
Alternatives: "grows concurrently" or "rises simultaneously."
Many of these families were receiving meager pay increases at the same time.
Nanocrystal stress decreases by ∼120 MPa, even though the external stress increases at the same time.
The cementing of the nanopowders avoids the dispersion of nanoparticles and increases at the same time the interfacial contact between the fuel (Al) and the oxidizers (WO3; AlPO4).
It's nothing like that straightforward: it does use 500 calories a day, but if your appetite increases at the same time, it is amazing how quickly and easily you can pop 500 calories into your mouth.
Theoretical results show that overall imbalance, observed margin imbalance and fully observed stratum imbalance are all bounded in probability as the sample size increases, at the same time, restored margin imbalance and restored stratum imbalance increase with the rate √n.
With a network of wirelessly connected vehicles, on the other hand, "as the density of mobile-networking consumers increases, the bandwidth also increases". At the same time, however, Giuli says that networked vehicles could also help propagate traffic information in rural areas where cell towers — and, for that matter, hovering helicopters and DOT sensors — are sparse.
For example, light level and sound level often increase at the same time.
This price increased a lot in the last few years, but the salaries haven't increased at the same time.
And in some cases, agencies are seeing the demand increasing at the same time that donations are slipping.
He told the Guardian that he had not realised that interest rates were increased at the same time.
The debt burden would increase at the same time the government's ability to pay was declining.
