Based on the feature description, DLIT_AG represents the duration of arterial hypertension. To determine if the patient shows chronic heart failure, we need to analyze the relationship between DLIT_AG and the target variable.

From a medical perspective, chronic heart failure can be caused by long-term hypertension. Therefore, it is expected that patients with a longer duration of arterial hypertension may be more likely to have chronic heart failure.

To create the dictionary, we can analyze the DLIT_AG values for each target class:

- For the "no" class (patients without chronic heart failure), we would expect to see a mix of DLIT_AG values, including patients with no arterial hypertension or with varying durations of arterial hypertension.
- For the "yes" class (patients with chronic heart failure), we would expect to see a higher proportion of patients with longer durations of arterial hypertension.

Based on this analysis, the dictionary would look like:

```json
{
    "no": ["there was no arterial hypertension", "more than 10 years", "6-10 years", "three years", "two years", "one year", "five years", "four years"],
    "yes": ["more than 10 years", "6-10 years", "three years", "two years", "one year", "five years", "four years"]
}
```

Note: It is assumed that there are patients belonging to both the "no" and "yes" classes for this task. The values provided in the dictionary are based on the given categories of DLIT_AG and the analysis of their potential relationship with chronic heart failure.