We're dividing 43366754 by 351 
The aim is to understand the frequency of 351 in 43366754.

Moving on to step 1:
351 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 351

Moving on to step 2:
When dividing 43 by 351, we get 0 with a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Include the next digit (3) from the dividend after 43, then repeat: 433 / 351

Advancing to step 3:
If we divide 433 by 351, we get 1 and a remainder of 82.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 351 from 433 and we're left with 82.
Bring next digit (6) of the dividend behind the 82 and repeat the process: 826 / 351

On to step 4:
If we divide 826 by 351, we get 2 and a remainder of 124.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 702 from 826 leaves us with 124.
Append the next digit (6) from the dividend to 124 and continue with: 1246 / 351

Let's proceed to step 5:
If we divide 1246 by 351, we get 3 and a remainder of 193.
Put 3 as the next digit of the answer. 
Result so far: 123.0
If we take 1053 away from 1246, we end up with 193.
Fetch the next digit (7) from the dividend, attach it to 193 and continue: 1937 / 351

Let's proceed to step 6:
351 can be fit into 1937 5 times, resulting in a remainder of 182.
Write down 5 as next digit of the result. 
Result so far: 1235.0
Subtract 1755 from 1937 to get 182.
Grab the next digit (5) from the dividend, add it to 182, then carry on: 1825 / 351

On to step 7:
351 can be fit into 1825 5 times, resulting in a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 12355.0
Subtract 1755 from 1825 to get 70.
Take the next digit (4) from the dividend and append it to 70, then repeat: 704 / 351

Let's proceed to step 8:
When dividing 704 by 351, we get 2 with a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 123552.0
Subtracting 702 from 704 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
351 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 123552.0
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.

Going ahead to step 10:
200 divided by 351 is 0 with a remainder of 200.
Record the quotient 0 as the next digit in the result. 
Result so far: 123552.0
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

After the division, we end up with 123552.0 and a remainder of 0.2.