Based on my prior knowledge, there may be a relationship between the duration of arterial hypertension (DLIT_AG) and the presence of chronic heart failure in a patient. I will analyze the data to determine this relationship and create the requested dictionary.

To begin, I will analyze the frequency of DLIT_AG values for patients with and without chronic heart failure. Then, I will consider whether any patterns emerge that indicate a relationship between DLIT_AG and chronic heart failure.

After analyzing the data, the dictionary will be created with the possible values of DLIT_AG for each target class (yes and no).

Here is the dictionary for the given feature and task:

```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"]
}
```

Please note that the values mentioned in the dictionary are based on the analysis of the relationship between DLIT_AG and chronic heart failure. Other categories not mentioned in the dictionary either have a negligible frequency or are hard to predict for the task of determining chronic heart failure.