| - noun | + noun | Total | |||
| Variable | - customer named | + customer named | - customer named | + customer named | |
| Noun + Customer named | 91 | 1 | 1448 | 481 | 2021 |
| Average open rate | 12.18% | 15.27% | 11.77% | 14.24% | 12.38% |
| - verb | + verb | Total | |||
| Variable | - customer named | + customer named | - customer named | + customer named | |
| Verb + Customer named | 1004 | 318 | 535 | 164 | 2021 |
| Average open rate | 11.97% | 14.42% | 11.46% | 13.90% | 12.38% |
| - adjective | + adjective | Total | |||
| Variable | - customer named | + customer named | - customer named | + customer named | |
| Adjective + Customer named | 1022 | 226 | 517 | 256 | 2021 |
| Average open rate | 11.94% | 14.36% | 11.51% | 14.13% | 12.38% |
| - adverb | + adverb | Total | |||
| Variable | - customer named | + customer named | - customer named | + customer named | |
| Adverb + Customer named | 792 | 416 | 747 | 66 | 2021 |
| Average open rate | 12.26% | 14.71% | 11.31% | 11.31% | 12.38% |
| - pronoun | + pronoun | Total | |||
| Variable | - customer named | + customer named | - customer named | + customer named | |
| Pronoun + Customer named | 1398 | 381 | 141 | 101 | 2021 |
| Average open rate | 11.77% | 14.10% | 12.05% | 14.76% | 12.38% |