We look at the division of 20985637 by 290 
The aim is to understand the frequency of 290 in 20985637.

Step 1:
If we divide 2 by 290, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 290

Advancing to step 2:
When dividing 20 by 290, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 290

On to step 3:
If we divide 209 by 290, we get 0 and a remainder of 209.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 209 and we're left with 209.
Take the next digit (8) from the dividend and append it to 209, then repeat: 2098 / 290

Moving on to step 4:
290 goes into 2098 7 times with a remainder of 68.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 68 after subtracting 2030 from 2098.
Grab the next digit (5) from the dividend, add it to 68, then carry on: 685 / 290

Let's proceed to step 5:
685 divided by 290 is 2 with a remainder of 105.
Write down 2 as next digit of the result. 
Result so far: 72.0
Subtract 580 from 685 to get 105.
Include the next digit (6) from the dividend after 105, then repeat: 1056 / 290

Advancing to step 6:
If we divide 1056 by 290, we get 3 and a remainder of 186.
Write down 3 as next digit of the result. 
Result so far: 723.0
If we take 870 away from 1056, we end up with 186.
Include the next digit (3) from the dividend after 186, then repeat: 1863 / 290

Going ahead to step 7:
1863 divided by 290 is 6 with a remainder of 123.
The next digit of our result is 6. 
Result so far: 7236.0
The remainder is 123 after subtracting 1740 from 1863.
Take the next digit (7) from the dividend and append it to 123, then repeat: 1237 / 290

Step 8:
290 goes into 1237 4 times with a remainder of 77.
The next digit of our result is 4. 
Result so far: 72364.0
If we subtract 1160 from 1237, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 9:
290 can be fit into 770 2 times, resulting in a remainder of 190.
The next digit of our result is 2. 
Result so far: 72364.2
If we subtract 580 from 770, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Let's proceed to step 10:
1900 divided by 290 is 6 with a remainder of 160.
The next digit of our result is 6. 
Result so far: 72364.26
If we subtract 1740 from 1900, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 11:
The number 290 fits into 1600 5 times, leaving a remainder of 150.
Use 5 as the next digit of our solution. 
Result so far: 72364.265
If we take 1450 away from 1600, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Going ahead to step 12:
The number 290 fits into 1500 5 times, leaving a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 72364.2655
Subtract 1450 from 1500 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

After the division, we end up with 72364.2655 and a remainder of 0.0005.