Left panel: halo-mass function according to Sheth et al. (2001) for z = 0 (solid line) and z = 1 (dashed line). Middle panel: lensing probability according to Eq. (3) for z_s from 0.1 to 6.0 and NFW halos with a minimum Einstein radius of 5 arcseconds. Right panel: integrated number of observable multiply imaged FRBs per square degree per year from z = 0 out to z_lim from 0.1 to 6.0 according to Eq. (6).