/// find - Search for the first string \arg Str in the string.
///
-/// \return - The index of the first occurence of \arg Str, or npos if not
+/// \return - The index of the first occurrence of \arg Str, or npos if not
/// found.
size_t StringRef::find(StringRef Str, size_t From) const {
size_t N = Str.size();
/// rfind - Search for the last string \arg Str in the string.
///
-/// \return - The index of the last occurence of \arg Str, or npos if not
+/// \return - The index of the last occurrence of \arg Str, or npos if not
/// found.
size_t StringRef::rfind(StringRef Str) const {
size_t N = Str.size();