Frame of Reference, Space, Time

Physicist Time is quantified Time, which is determined by a displacement of Space, e. g. the rotation of the hands of an analog clock. Thus, Velocity incorporates a Frame of Reference, i. e. the displacement in a timepiece, to which the displacement of the object is referred. Likewise, Acceleration introduces a second Frame of Reference, by doubling the first. So, if in Absolutism, the presence of a Frame of Reference is excluded, then Modern Physics is not Absolutist.  And, given that 'Time' is actually Space to begin with, it is difficult to understand what 'Spacetime', and, hence, 'Spacetime Curvature', might be.  So, insofar as Relativist Physics entails the existence of a Spacetime Curvature, Modern Physics is not easily classifiable as Relativist, either.  This is not to challenge the quantities themselves, merely the attempt to ontologize their relations.