Decay times of the radio bursts presented as a function of the frequency of the radio emission. Different colours show different type III bursts and different symbols show the different probes. The dashed black line show the result of the fit to the data performed by Kontar et al. (2019) on several data sets. The dashed red and orange lines show the result of the fit on the distribution of decay times from 30 radio bursts observed by STEREO and Parker Solar Probe, respectively (Krupar et al. 2020)