Check Whether Two Strings are Almost Equivalent LeetCode solution in Java

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class Solution {
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  public boolean checkAlmostEquivalent(String word1, String word2) {
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    Map<Character, Integer> map = new HashMap();
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    for (int i = 0; i < word1.length(); i++) {
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      map.put(word1.charAt(i), map.getOrDefault(word1.charAt(i), 0) + 1);
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      map.put(word2.charAt(i), map.getOrDefault(word2.charAt(i), 0) - 1);
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    }
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    for (int i : map.values()) { // get value set
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      if (i > 3 || i < -3) {
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        return false;
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      }
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    }
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    return true;
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  }
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}