This all depends on how long that person lives for, but if we take the average person surviving the average age of a human life-span (approximately 80 years), then the average persons heat will be a staggering three billion times! However, some people have what is known as a rapid heartbeat. This is where the heart works overtime and beats faster than it should.
A rapid heart beat or palpitations as they are sometimes called, are an awareness of your own heartbeat, usually because the heartbeat seems irregular, or unusually rapid, or in some other way "different" to normal. An abnormal heart rhythm is referred to as an arrhythmia.
Normally you are not aware of your heart beating at all. The heart beats in response to an electrical stimulus - a bit like the way a car engine fires in response to a spark from a spark plug, and palpitations usually stem from a problem in this electrical system that generates the heartbeat. The heart muscle can continue to contract effectively even if the electrical system is "misfiring" from time to time.
People have described their palpitations in lots of different ways, but there are some common patterns such as, it feels like the heart has stopped (although it hasn't) and the heart feels fluttery in the chest,
Palpitations may be associated with feelings of anxiety or panic; it is normal to feel the heart thumping when you are terrified of something, but it may be difficult sometimes for people to know which came first, the palpitations or the panic feeling. Unfortunately, since it can take some time before a clear diagnosis is made in a patient complaining of palpitations, people are sometimes told initially that the problem is anxiety.
Stressful situations cause an increase in the level of stress hormones, such as adrenaline, circulating in the blood, and there are some types of abnormal heart rhythm that can be stimulated by adrenaline excess, or by exercise. It may be possible to diagnose these sorts of palpitations by performing simple tests, such as an exercise test, while monitoring the ECG.
Some types of abnormal heart rhythm seem to be affected by posture, and you may notice that standing up straight after bending over provokes a rapid heart rate. Often these attacks can be abolished again by lying down. Many people, if not all of us, are more aware of the heartbeat when lying quietly in bed at night. This is partly because our attention is not focussed on other things, but also because the slower heart beat at rest can allow more premature beats to occur.

If you are healthy enough to maintain the average 72 bpm for 80 years your heart will beat 3,027,456,000 during your lifespan.

72 x 60 x 24 x 365 x 80
bpm x min x hr x days x year