Use mapped WordNet dictionary can boost speed alot, in JWNL there is an convert method that can create mapped dictionary files, however there it does not support usage count.

#To convert dictionary to map#

In Windows:
java -cp jwnl.jar;utilities.jar;commons-logging.jar net.didion.jwnl.utilities.DictionaryToMap <destination directory> <property file> 

In unix-like systems:
java -cp jwnl.jar:utilities.jar:commons-logging.jar net.didion.jwnl.utilities.DictionaryToMap <destination directory> <property file> 


#Make your own usage map#

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class WNUsageCountMap {
  
  
  
  Map<String, Integer> countMap;
  
  
  public static void main(String[] args) {
    WNUsageCountMap cm = new WNUsageCountMap("index.sense");
    System.out.println(cm.getUseageCount("sea%1:17:00::"));
  }
  
  
  WNUsageCountMap(String path){
    
    
    System.err.println("Loading count map..");
    countMap = new HashMap<String, Integer>();
    
    
    try {
      
      BufferedReader br = new BufferedReader(new FileReader(path));
      String line;
      
      
      while( (line = br.readLine()) != null ){
        String[] tkns     = line.split(" ");
        String   senseKey = tkns[0];
        int      count    = Integer.parseInt(tkns[3]);
        countMap.put(senseKey, count);
      }
      
      
      br.close();
      
      
    } catch (FileNotFoundException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    
  }
  
  
  public int getUseageCount(String senseKey) {
    
    return this.countMap.get(senseKey);
    
  }
  
  
}