These are two quotes I found on a website about the fewness of the saved:
'Our chronicles relate an even more dreadful happening. One of our brothers, well-known for his doctrine and holiness, was preaching in Germany. He represented the ugliness of the sin of impurity so forceful that a woman fell dead of sorrow in front of everyone. Then, coming back to life, she said, "When I was presented before the Tribunal of God, sixty thousand people arrived at the same time from all parts of the world; out of that number, three were saved by going to Purgatory, and all the rest were damned.'
St. Leonard of Port Maurice
"The following narrative from Saint Vincent Ferrer will show you what you may think about it. He relates that an archdeacon in Lyons gave up his charge and retreated into a desert place to do penance, and that he died the same day and hour as Saint Bernard. After his death, he appeared to his bishop and said to him, "Know, Monsignor, that at the very hour I passed away, thirty-three thousand people also died. Out of this number, Bernard and myself went up to heaven without delay, three went to purgatory, and all the others fell into Hell."
St. Leonard of Port Maurice
So out of sixty thousand only three were saved and out of thirty-three thousand five were saved. And we are arguing over Baptism of Desire. If BOD exists, how many people do you think it would save? Maybe a hundred. So for so few we are arguing so much. We should focus more on the fact that out of ten thousand souls who live beyond the use of reason, only one will be saved. And we should fear for our salvation. Sometimes I think about those who want to extend BOD to everyone and I think they are just trying to convince themselves that God will save almost everyone so they do not have to fear for their own salvation.