code: def test_min_freq(self, doc_en):
      result = list(extract.entities(doc_en, min_freq=2))
      assert len(result) == 0
  
imports: import collections
  import pytest
  from spacy.tokens import Span, Token
  from textacy import extract
  from textacy.extract import basics
label_desc: Use image node_id 5 for calling the TestEntities obj's underlying member method code with example usage: obj.test_min_freq(doc_en) without return types