I can help you with that! Here are some revised versions of the sentence to show that Danielle got experience with the language little by little over time:
1. Eventually, Danielle gradually acquired enough experience with the Spanish language that she could have a regular conversation with a native speaker.
2. Eventually, Danielle slowly secured enough experience with the Spanish language that she could have a regular conversation with a native speaker.
3. Eventually, Danielle steadily accumulated enough experience with the Spanish language that she could have a regular conversation with a native speaker.
4. Eventually, Danielle obtained enough experience with the Spanish language little by little over time, enabling her to have a regular conversation with a native speaker.
These revisions emphasize the incremental nature of Danielle's experience with the Spanish language, showing that it was gained gradually and not all at once. Each of these options conveys the idea that her language skills improved progressively until she reached the point of being able to have a conversation with a native speaker.