Based on prior knowledge, we can analyze the relationship between the feature DLIT_AG (Duration of arterial hypertension) and the target variable chronic heart failure.

It is well-established that arterial hypertension is a common risk factor for chronic heart failure. Therefore, we can expect that patients with a longer duration of arterial hypertension are more likely to have chronic heart failure.

To create the dictionary, we need to determine the DLIT_AG values that are associated with each target class. Here is the analysis:

- For the target class "no" (no chronic heart failure):
  - Values of DLIT_AG that are associated with no chronic heart failure are "there was no arterial hypertension" and possibly other short durations such as "one year" or "two years". These patients may not have had sufficient time for arterial hypertension to progress to chronic heart failure.

- For the target class "yes" (chronic heart failure):
  - Values of DLIT_AG that are associated with chronic heart failure are "more than 10 years", "6-10 years", "three years", "five years", and "four years". These patients have had a longer duration of arterial hypertension, which increases the likelihood of developing chronic heart failure.

Based on this analysis, the dictionary can be created as follows:

```json
{
	"no": ["there was no arterial hypertension", "one year", "two years"],
	"yes": ["more than 10 years", "6-10 years", "three years", "five years", "four years"]
}
```
Please note that this analysis is based on general knowledge, and there might be specific exceptions or additional factors to consider in a real-world scenario.