The probabilistic model is another basic model that follows
the approach of partial matching. Unlike the vector space model
and the Boolean model, the probabilistic model has the approach
of calculating the probability of the number of times a word may
occur in a document and henceforth the number of documents
that may be better fitting for the query that needs to be answered
through the retrieval of documents. The probabilistic model
works through the iterative approach. This implies that the
probabilistic model tends to improve the search and get better
results with every repetition of the query. Although this increases
the effectiveness of the results, time consumed to get the desired
result becomes more, which makes the result less valuable for the
user seeking immediate information.