wordSet.cache.expireAfterAccess
                                                    Specifies how long a wordset is kept in the NLE cache after being accessed.
| 
                                                                     Value  | 
                                                                
                                                                     Integer: seconds  | 
                                                            
| 
                                                                     Default  | 
                                                                
                                                                     432000  | 
                                                            
| 
                                                                     How to set  | 
                                                                
                                                                     In Management Station, set on the Natural Language Engine service. If not using Management Station, set in the NLE configuration file (User-nle01.properties, see Configuration roadmap).  | 
                                                            
| 
                                                                     Usage  | 
                                                                
                                                                     Seldom changed.  | 
                                                            
After this interval (by default five days, expressed in seconds), wordsets are removed the next time the cache is cleaned.