Keywords: overtime, hour after hour, round the clock, around the clock
Sign Definition
As a Noun
                                            1.  Time that you spend at your job in addition to your normal working hours. English = overtime.
                                          
                                          
                                        As Modifier
                                            1.  Used after a verb (action) sign to mean the action takes place over several hours making it take longer than is usual. Idiomatic English = hour by hour, round the clock, around the clock.
                                          
                                          
                                        
                                            2.  Used after the sign work to mean the work is in addition to your normal working hours. English = overtime.
                                          
                                          
                                         
                  
                      