ROSARY vs. CHAPLET: Rosary has five groups of ten Hail Mary beads separated by one Our Father bead, with five additional beads by the crucifix. A chaplet has any other combination of beads that is used to pray for a particular intention

Seven sorrows:

1. The Prophecy of Simeon. 
2. The escape and flight into Egipt.
3. The Loss of the Child Jesus in the Temple of Jerusalem. 
4. The Meeting of Mary and Jesus on the Via Dolorosa
5. The Crucifixion Of Jesus on Mount Calvary. 
6. The Piercing of the Side of Jesus with a spear, and His Descent from the Cross.
7. The Burial of Jesus by Joseph of Arimathea.