@@ -121,7 +121,7 @@ class constructor, using the `frd` factory function, or
     Notes
     -----
     The main data members are `omega` and `frdata`, where `omega` is a 1D
-    array of frequency points and and `frdata` is a 3D array of frequency
+    array of frequency points and `frdata` is a 3D array of frequency
     responses, with the first dimension corresponding to the output index of
     the FRD, the second dimension corresponding to the input index, and the
     3rd dimension corresponding to the frequency points in omega.  For example,
 
@@ -1567,7 +1567,7 @@ def input_output_response(
     This is often useful for interconnected control systems where the
     process dynamics are the first system and all other components start
     with zero initial condition since this can be specified as [xsys_0, 0].
-    A warning is issued if the initial conditions are padded and and the
+    A warning is issued if the initial conditions are padded and the
     final listed initial state is not zero.
 
     If discontinuous inputs are given, the underlying SciPy numerical