Religious devotion, public or private, for the duration of nine days to gain special graces, is called a Novena. Those who perform it with a lively hope of having their request granted, and with perfect faith and resignation if it be refused, may be assured that Christ will grant some grace or blessing. This requires an understanding that in His infinite wisdom and mercy, He may refuse the particular favor which is requested.
Novenas originated in imitation of the Apostles who were gathered together in prayer for nine days from the time of Our Lord's Ascension (to Heaven) until Pentecost Sunday (the descent of the Holy Spirit).
This practice of saying the Rosary nine times in the form of the Rosary Novena in petition or thanksgiving, is another way of heeding Our Lady's request to Pray the Rosary.
The 54 Day Novena Devotion which originated in 1884 at the Sanctuary of Our Lady of the Rosary of Pompei, consists of the daily recitation of five decades of the Rosary (one complete Mystery: Joyful, Sorrowful, or Glorious) for twenty-seven days in petition and five decades for twenty-seven additional days in thanksgiving. You will actually be making three Novenas in petition for a particular favor and three Novenas in thanksgiving for a particular favor.
1st day say the 5 Joyful Mysteries
2nd day say the 5 Luminous Mysteries
3rd day say the 5 Sorrowful Mysteries
4th day say the 5 Glorious Mysteries
5th day begin again the 5 Joyful Mysteries, etc.