| + | Required word – matches exactly 1 word-form
the + days matches the old days, the good days, the bad days... |
| ~ | Optional word – matches 0 or 1 word-form
the ~ days matches the days, the old days, the good days, the bad days... [~ matches 0 or 1 word-forms] the ~ ~ days matches the days, the old days, the good days, the good old days... [~ ~ matches 0, 1 or 2 word forms] |
For example, to match ____, enter...
- all 3-grams + + +
- 4-grams beginning with the only the only + +
- 3- or 4-grams beginning with the only the only +
~
| * | 0 or more characters nation* matches nation, nations, national, nationalistic, nationalise... |
| ? | Exactly 1 character s?ng matches sing, sang, sung, song... |