I will suggest that they are extremely common, the very fabric of our universe. Most people have experienced, read about, or heard of these weird, repetitive events. Like those who got stricken seven times by lightning, when most of us have not been close to it once. Some thinkers have even proposed to consider repeated coincidences as evidence of the workings of some distinct force in Nature. A specific image of reality seems to emerge from the above.
Reality is a dense three-dimensional fabric, a kind of spider s web.
As we live every instant, we spin additional threads on the web or are drawn in the threads of others. Everything we do or everything done around us can be considered as an additional dot along these strings or life line. These innumerable threads cross each other, warp and woof, building the web of reality, a fabric in space and time. I do not mean this in a metaphoric way. As a physician, I have experienced these threads physically and even modified them.