We look at the division of 353901 by 88 
The aim is to understand the frequency of 88 in 353901.

Advancing to step 1:
The number 88 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 88

Going ahead to step 2:
The number 88 fits into 35 0 times, leaving a remainder of 35.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 35, we get 35.
Append the next digit (3) from the dividend to 35 and continue with: 353 / 88

Let's proceed to step 3:
When dividing 353 by 88, we get 4 with a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 352 from 353, we get 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 88

Let's proceed to step 4:
The number 88 fits into 19 0 times, leaving a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 40.0
The remainder is 19 after subtracting 0 from 19.
Grab the next digit (0) from the dividend, add it to 19, then carry on: 190 / 88

Moving on to step 5:
The number 88 fits into 190 2 times, leaving a remainder of 14.
Use 2 as the next digit of our solution. 
Result so far: 402.0
Subtract 176 from 190 to get 14.
Grab the next digit (1) from the dividend, add it to 14, then carry on: 141 / 88

On to step 6:
When dividing 141 by 88, we get 1 with a remainder of 53.
The next digit of our result is 1. 
Result so far: 4021.0
Subtracting 88 from 141 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

On to step 7:
88 goes into 530 6 times with a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 4021.6
Subtract 528 from 530 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 8:
88 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 4021.6
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
88 can be fit into 200 2 times, resulting in a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 4021.602
If we take 176 away from 200, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 10:
If we divide 240 by 88, we get 2 and a remainder of 64.
Use 2 as the next digit of our solution. 
Result so far: 4021.6022
The remainder is 64 after subtracting 176 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 4021.6022, with a leftover of 0.00064.