  Quasi-periodic oscillation (QPOs) analysis is important for understanding the
dynamical behavior of many astrophysical objects during transient events such
as gamma-ray bursts, solar flares, magnetar flares, and fast radio bursts. In
this paper, we analyze QPO data in low-mass X-ray binary (LMXB) systems, using
the Lense-Thirring, Kerr, and approximate Zipoy-Voorhees metrics. We
demonstrate that the inclusion of spin and quadrupole parameters modifies the
well-established results for the fundamental frequencies in the Schwarzschild
spacetime. We interpret the QPO data within the framework of the standard
relativistic precession model, allowing us to infer the values of the mass,
spin, and quadrupole parameters of neutron stars in LMXBs. We explore recent
QPO data sets from eight distinct LMXBs, assess their optimal parameters, and
compare our findings with results in the existing literature. Finally, we
discuss the astrophysical implications of our findings.
