Time distribution of the secondary datasets used in combination with the mock TESS data to test search methods for periodic transit signals detected as single events in the TESS data. Each block represents a continuous dataset with gaps shorterthan one day. The data are plotted relative to the time at the first observation, HJD (1). The HATnet and WASP data on HAT-P-2 are merged in signal H2 (see Table 1) for the tests presented in this paper.