As in the above subsections, we now look for for words containing dots.
Because words usually do not contain dots, we will find abbreviations with multiple dots, URLs and processing problems.
Two dots inside the word:
select w_id-100,freq, word from words where word like "%.%._%" limit 10;
3.12.1 Words with Hyphens
3.12.2 Multiwords
3.12.4 Words containing special characters