  FRB 180916.J0158+65 has been found to repeatedly emit fast radio bursts with
the period in roughly 16 days. We propose that such periodicity comes from
orbit-induced, spin precession of the emitter, which is possibly a neutron
star. Depending on the mass of the companion, the binary period ranges from
several hundred to thousands of seconds. Such tight binaries have a relatively
short lifetime, which does not likely come from the gravitational decay of a
wide binary. We comment on the relation to GW190425 and the possibility in LISA
and LIGO detections.
