  This document illustrates the feasibility of a few per cent level measurement
of the local black hole occupation fraction in low mass galaxies through
wide-field, high angular resolution X-ray imaging observations of local volume
galaxies. The occupation fraction, particularly at the low end of the galaxy
luminosity function, is a key benchmark for any model which aims to reproduce
the formation and growth of super-massive black holes and their host galaxies.
Our proposed measurement will complement orthogonal efforts that are planned in
X-rays at high red-shifts, as well as in the local Universe with ground-based
facilities.
