  In this paper, we analyze the dependence of the topological charge density
from the overlap operator on the Wilson mass parameter in the overlap kernel by
the symmetric multi-probing source (SMP) method. We observe that the
non-trivial topological objects are removed as the Wilson mass is increased. A
comparison of topological charge density calculated by the SMP method using
fermionic definition with that of gluonic definition by the Wilson flow method
is shown. A matching procedure for these two methods is used. We find that
there is a best match for topological charge density between gluonic definition
with varied Wilson flow time and fermionic definition with different Wilson
mass. By using the matching procedure, the proper flow time of Wilson flow in
the calculation of topological charge density can be estimated. As the lattice
spacing $a$ decreases, the proper flow time also decreases, as expected.
