== MEASURING TIME  ==           

                                    Annual - every year

                                    Biannual - two times a year

                                    Bicentennial - every 200 years

                                    Biennial - every two years

                                    Bimonthly - every two months

                                    Centennial - every 100 years

                                    Decade - 10 years

                                    Decennial - every 10 years

                                    Duodecennial - every 12 years

                                    Lustrum - for five years

                                    Millennium - 1,000 years

                                    Novennial - every 9 years

                                    Octennial - every 8 years

                                    Perennial - year after year

                                    Quadrennial - every 4 years

                                    Quadricentennial - every 400 years

                                    Quincentennial - every 500 years

                                    Quindecennial - every 15 years

                                    Quinquennial - every 5 years

                                    Score - 20 years

                                    Semiannual - every 6 months

                                    Semicentennial - every 50 years

                                    Semidiurnal - twice a day

                                    Septennial - every 7 years

                                    Sesquicentennial - every 150 years

                                    Sexennial - every 6 years

                                    Tricennial - every 30 years

                                    Triennial - every 3 years

                                    Undecennial - every 11 years

                                    Vicennial - every 20 years