"High cadence" refers to the speed or rate at which something is repeated or performed, often used to describe the frequency of steps or pedal rotations in activities like running or cycling. Full definition
«And though the HARPS team was able to hit the star with much higher cadence over the past 6 years, our early observations more than doubled the overall time base of the data set, enabling much stronger constraints to be placed on the planet solutions.» (keckobservatory.org)
Our new -LCB- \ em Spitzer -RCB- observations were taken two years after the original K2 discovery data and have a significantly higher cadence, allowing us to derive improved estimates for this planet's radius, semi-major axis, and orbital period, which greatly reduce the uncertainty in the prediction of near future transit times for the -LCB- \ em James Webb Space Telescope -RCB--LRB--LCB- \ em JWST -RCB--RRB- observations. (arxiv.org)
So it's often the case that people do end up running much faster and at a much higher cadence after a few months (or years) of slow running. (runninginsystems.com)