proficiency
noun
                                                                                                                            
                                                            pro·fi·cien·cy
                    
                                                                                                              
                                                                                                                                  prə-ˈfi-shən(t)-sē  
                                                      
                                                          
            1
                    
                                          
              
          
                                                      : advancement in knowledge or skill : progress                                      
                
                    
2
                    
                                          
              
          
                                                      : the quality or state of being proficient                                      
                
                    
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  Merriam-Webster unabridged




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