Now we are going to speak about the frequency
of an event and also of the magnitude.
Regarding the expected frequency,
it is fair to say that the predicted frequency
can be defined as the number of events per unit of time
for a given event
or as its probability to occur under given circumstances.
Speaking of the magnitude of the consequences,
the magnitudes of the consequences
could be defined
as all those consequences
estimated in terms of effects on health
or economic impact.
And now,
we have to define a term that we have used before.
On one hand,
we have to speak of a very important concept
and define the term "hazard".
"Hazard" is the intrinsic ability of a dangerous substance
or physical situation to cause damage to human health
or to the environment.
On the other hand,
we have defined risk, as we have seen,
as: "the probability that a specific effect
will occur in a given period of time
or under certain circumstances".