Planet detectability from RV error measurements and number of visits as a function of the rotation period, compared to the habitable-zone period domains. Orange and blue depict the stellar host temperature below or above 3400 K. Stars without measured or literature values for the rotation period are arbitrarily placed at an abscissa value of 1000 days. Known planets in our sample are also included twice, first using their orbital period (open circles), and a second time using the rotation period of their star (open squares).