Word frequency chart shows the frequency of different words in a text in the form of histogram or line chart, which is usually used to analyze the keywords and themes of the text. On the other hand, the cloud image of words presents words with high frequency in the text with different font sizes and colors, emphasizing the importance and relevance of words. The cloud image of words is usually used to express the theme and emotion of words intuitively.
Although both word frequency graph and word cloud graph can be used for text analysis, the emphasis and presentation are different, so it is necessary to choose which graph to use according to the specific analysis purpose and demand.