Spin-down age vs period for the pulsars whose profiles are not affected by scattering in HBAs. Here the shape- and colour-coding represent the difference of the number of peaks for each pulsar between HBAs and L-band relative to the HBAs. In red (triangles down) are the pulsars for which the number of peaks becomes smaller at HBAs than it is in L-band, in blue (triangles up) are the pulsars for which the number of peaks becomes higher at HBAs than it is in L-band, and in green (triangles right) are the pulsars for which the number of peaks does not change. At the top and on the right-hand side the stacked histograms represent the trends of the number of peaks as a function of period and age of the pulsar, respectively.