@Sonia: You mentioned in an earlier post that your plan was to walk from Le Puy to Santiago in September, walking about 2-1/2 months. September is the single most popular month for walking in France (per Ram at Ultreia in Moissac), as the young retirees give the grandchildren back to mom and dad for the start of the school year and now are at liberty. Both years I walked in France, I walked in September. The gites were full. The evening tables at the demi-pension accommodations were full. You are in no danger of being alone in the evening. During the day, you may if you like walk alone, but there will be quite a few people ahead and behind. So if you needed assistance, it would be readily available.
That being said, there are pulses of pilgrims on the path. Some days of the week are very popular for leaving Le Puy. Remember that 85% of the walkers on that route are French, so the busiest times for leaving Le Puy are on the weekend. Mid-week is a bit less busy. If you leave Le Puy in a crowd, you will pretty much be walking along with them the next two weeks.
I felt very safe, personally. Everyone looks out for each other. The French were very solicitous. (No place is a paradise of course, and so the usual travel cautions apply.)