code: def test_min_freq(self, doc_en):
      text = doc_en.text.lower()
      result = list(
          extract.noun_chunks(doc_en, drop_determiners=True, min_freq=2)
      )
      assert all(text.count(span.text.lower()) >= 2 for span in result)
  
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 3 for calling the TestNounChunks obj's underlying member method code with example usage: obj.test_min_freq(doc_en) without return types