code: def test_sub_n_gt_1_ticks(self, tick_classes, n):
      # GH#23878
      p1 = Period("19910905", freq=tick_classes(n))
      p2 = Period("19920406", freq=tick_classes(n))
  
      expected = Period(str(p2), freq=p2.freq.base) - Period(
          str(p1), freq=p1.freq.base
      )
  
      assert (p2 - p1) == expected
  
imports: from datetime import timedelta
  import numpy
  import pytest
  from pandas._libs.tslibs.period import IncompatibleFrequency
  from pandas import NaT, Period, Timedelta, Timestamp, offsets
label_desc: Use image node_id 6 for calling the TestPeriodArithmetic obj's underlying member method code with example usage: obj.test_sub_n_gt_1_ticks(tick_classes, n) without return types