0 if
phrase contains no words or
if phrase is not found. Several whitespace
characters between words in either
phrase or the receiving string are treated as
a single blank for the comparison, but, otherwise, the words must match
exactly."now is the time"~wordPos("the") --> 3
"now is the time"~wordPos("The") --> 0
"now is the time"~wordPos("is the") --> 2
"now is the time"~wordPos("is the") --> 2
"now is the time"~wordPos("is time ") --> 0
"To be or not to be"~wordPos("be") --> 2
"To be or not to be"~wordPos("be",3) --> 6