  The GGSS is a partially-filled, all-sky survey to identify K-giant stars with
low level of RV-variability. We study histograms of the radial velocity (RV)
variability obtained in the early phase of the Grid Giant Star Survey (GGSS,
Bizyaev et al., 2006). This part of the survey has been conducted with a very
limited nubmer of observations per star, and rough accuracy. We apply the
Monte-Carlo simulations to infer a fraction of the RV-stable stars in the
sample. Our optimistic estimate is that 20% of all considered K-giants have
RV-variability under 30 m s$^{-1}$. Different assumptions of intrinsic
RV-variability for our stars give 12 -- 20 % of RV-stable K-giants in the
studied sample.
