diff --git a/src/Helpers/Finder.php b/src/Helpers/Finder.php
index 15e4480..afba066 100644
--- a/src/Helpers/Finder.php
+++ b/src/Helpers/Finder.php
@@ -14,7 +14,30 @@ class Finder
      */
     public function grep($repository, $grepArgument)
     {
-        $process = new Process('git ls-tree -r --name-only HEAD | grep ' . ProcessUtils::escapeArgument($grepArgument));
+        $command = 'git ls-tree -r --name-only HEAD | grep ' . ProcessUtils::escapeArgument($grepArgument);
+        return $this->getCommandResult($repository, $command);
+    }
+
+    /**
+     * @param $repository
+     * @param $grepArgument
+     * @param string $since 
+     * @return array
+     */
+    public function grepTimed($repository, $grepArgument, $since = '1 day ago'){
+        // git whatchanged --since '24 day ago' --oneline --pretty=format: --name-only | grep Test.php
+        $command = 'git whatchanged --since \'' . $since . '\' --oneline --pretty=format: --name-only | grep ' . ProcessUtils::escapeArgument($grepArgument);
+        return $this->getCommandResult($repository, $command);
+    }
+
+    /**
+     * @param $repository
+     * @param $command
+     * @return array
+     */
+    protected function getCommandResult($repository, $command)
+    {
+        $process = new Process($command);
         $process->setWorkingDirectory($repository->getPath());
         $process->run();
         $output = trim($process->getOutput());