Top panel: comparison of the LSD Stokes I profiles of HD 101412 computed for individual subexposures recorded over six observing nights in 2014 February using the line mask of 1007 metallic lines. Eight individual subexposures were obtained during the first night, while four subexposures were obtained for each following night. Bottom panel: differences between Stokes I profiles computed for the individual subexposures and the average Stokes I profile. The dashed lines indicate the standard deviation limits.