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Mining the frequent pattern deals with the finding patterns in large set of data, subsequences and substructures that occur in a database frequently. Likewise, We can use Frequent pattern mining for MANET nodes in order to identify the paths which are participated in frequent data transaction among the various Mobile adhoc network nodes. The network data stream is a long and continuous sequence of data sets transmitted over the network. The OCA (Online Combinatorial Approximation) algorithm is used in the data stream for mining online data. The processing time of OCA was much less and accuracy of its approximate result was quite high like other traditional mining methods. The Data Path Combinatorial Approximation (DPCA) algorithm deals with a frequent pathset mining over the MANET data flow. The pathset is generation of path from the set of paths on any node which are provided paths to various …