Try this in Assign activity
' Count occurrences of "Vishal" and its variations
vishalCount = arry.Count(Function(str) System.Text.RegularExpressions.Regex.IsMatch(str, "(?i)v.?i.?s.?h.?a.?l"))
' Count occurrences of "Rohit" and its variations
rohitCount = arry.Count(Function(str) System.Text.RegularExpressions.Regex.IsMatch(str, "(?i)r.?o.?h.?i.?t"))
Code:
Output:

