Trivial frequency-counting backend for Text.WordCloud.
Returns each candidate term's raw occurrence count as its score. The
resulting cloud is dominated by whatever survives the stopword
filter — useful as a sanity-check baseline and for inputs where
there is genuinely no reference corpus to compare against, but
almost always less informative than Text.WordCloud.Backends.YAKE
for English-style text.
Honours the orchestrator's :ngram_range, :case_fold,
:stopwords, and :language options. The returned :weight after
normalisation is count / max_count.