Spin fluctuation in LiV2O4 is revisited by examining the earlier result of muon spin rotation/relaxation measurement. Instead of the relationship for the localized electron limit, that between muon depolarization rate and spin fluctuation rate (nu(D)) for itinerant electron systems is used to reanalyze data, which reveals that nu(D) varies linearly with temperature (nu(D) alpha T) over a range 10(8)-10(12) s(-1) for 0.02 <= T < 10(2) K. Such a linear T behavior as well as the magnitude of nu(D) is fully consistent with the behavior of magnetic relaxation rate previously observed by inelastic neutron scattering (INS), demonstrating that mu SR and INS have a common time window over a fluctuation spectrum. The linear T dependence of nu(D) is understood as a specific feature predicted by a Hubbard model for intersecting one-dimensional (1D) chains. This quasi-1D character, which is coexistent with enhanced uniform susceptibility at low temperatures, supports the scenario of 1D-to-3D crossover for the microscopic origin of heavy-fermion behavior in LiV2O4.