Sorting data table on frequency in Flutter

Question

I am new to flutter and I am in the learning phase. I am trying to fill my table from dummy data which is in another dart file. I am using flutter table rows and columns and I need help in sorting the most frequent data on the top row of the table based on its frequency. and how can I get dummy data which is in a separate dart file (dummy data) into my table row cells and how to sort it based on frequency?

List dummyData = [
{'fruit': 'Apples', 'frequency': 40},
{'fruit': 'Bananas', 'frequency': 35},
{'fruit': 'Grapes', 'frequency': 19},
{'fruit': 'Avocados', 'frequency': 16},
{'fruit': 'Pears', 'frequency': 10} ],

Required result is shown here