We look at the division of 402909 by 70 
The aim is to understand the frequency of 70 in 402909.

Step 1:
4 divided by 70 is 0 with 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.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 70

Going ahead to step 2:
40 divided by 70 is 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 40 leaves us with 40.
Grab the next digit (2) from the dividend, add it to 40, then carry on: 402 / 70

Advancing to step 3:
70 can be fit into 402 5 times, resulting in a remainder of 52.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we take 350 away from 402, we end up with 52.
Take the next digit (9) from the dividend and append it to 52, then repeat: 529 / 70

On to step 4:
529 divided by 70 is 7 with a remainder of 39.
Record the quotient 7 as the next digit in the result. 
Result so far: 57.0
If we subtract 490 from 529, we get 39.
Grab the next digit (0) from the dividend, add it to 39, then carry on: 390 / 70

Let's proceed to step 5:
390 divided by 70 is 5 with a remainder of 40.
Record the quotient 5 as the next digit in the result. 
Result so far: 575.0
Deduct 350 from 390 and we're left with 40.
Take the next digit (9) from the dividend and append it to 40, then repeat: 409 / 70

Step 6:
If we divide 409 by 70, we get 5 and a remainder of 59.
Write down 5 as next digit of the result. 
Result so far: 5755.0
If we take 350 away from 409, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 7:
If we divide 590 by 70, we get 8 and a remainder of 30.
Record the quotient 8 as the next digit in the result. 
Result so far: 5755.8
Subtract 560 from 590 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
If we divide 300 by 70, we get 4 and a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 5755.84
The remainder is 20 after subtracting 280 from 300.
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:
The number 70 fits into 200 2 times, leaving a remainder of 60.
Write down 2 as next digit of the result. 
Result so far: 5755.842
Subtract 140 from 200 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 10:
If we divide 600 by 70, we get 8 and a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 5755.8428
The remainder is 40 after subtracting 560 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 11:
400 divided by 70 is 5 with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 5755.84285
If we subtract 350 from 400, we 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.

Step 12:
If we divide 500 by 70, we get 7 and a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 5755.842857
If we take 490 away from 500, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 13:
70 goes into 100 1 times with a remainder of 30.
The next digit of our result is 1. 
Result so far: 5755.8428571
Deduct 70 from 100 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 14:
70 goes into 300 4 times with a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 5755.84285714
Subtract 280 from 300 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 5755.84285714 and a remainder of 2e-08.