| very | 12 | degree |
| especially the chinese language | 5 | other |
| no doubt | 3 | other |
| learning → be → tough | 74 |
| learning → be → tough job | 7 |
| learning → be → tough going | 4 |
| negative | neutral | positive |
| 0.402 | 0.389 | 0.209 |
| Raw frequency | 85 |
| Normalized frequency | 0.488 |
| Modifier score | 0.400 |
| Perplexity | 52.286 |