给定一个英文段落和一个单词，检查该单词是否在段落中出现，并输出其出现的次数。


段落: AI is becoming smarter every day and has the potential to revolutionize our lives. It is already being used in many industries, such as healthcare and finance. However, some people are concerned about the negative effects that AI could have on society if it is not used responsibly.
单词: revolutionize
单词"revolutionize"在该段落中出现了一次。