A four-word word with the number "one":

conceited

Forgetting righteousness before profit, not making progress.

Hang together/stick together/form a group

Be popular for a while

Please say it again.

Contrary to the past?

treat all alike

Untidy or inconsistent.

One?

The best in the world-unparalleled

Four-word words with the number "two":

There is no difference at all.

One by one.

I don't know what happened.

The only way?

Every day is two days?

There is no second master at home?

A four-word word with the number "three":

at dead of night

go back on one's word

Three legs?

Feudal society used to praise women.

Upset?

Avoid miyake?

For the sake of a healthier omen

make three calls at the thatched cottage/repeatedly request sb to take up a post

A four-word word with the number "four":

Chop and change?

Embattled?

Safe and sound

Extend in all directions

Four Books and Five Classics?

Four wives and six?

There are flames everywhere?

Famous in the world?

Four-word words with the number "five":

Five continents and four seas?

Viscera?

Colorful

In twos and threes

15 10?

Ninth Five-Year Plan? -refers to the emperor.

Repeated warnings and orders

A four-word word with the number "six":

Oh! Drink six?

Six quiet?

Liuchu Qishan

Six gods without a master?

unmerciful/ruthless

Three, six, nine, etc?

Pregnant?

Three media and six certificates?

Three palaces and six hospitals?

A four-word word with the number "seven":

compound

(of a person's mental state) Like a well, seven barrels go up and eight barrels go down ―― mental instability.

Hit the snake seven inches

Talk?

Straddle?

Seven vertical and eight horizontal?

Very messy

Three souls and seven spirits?

Seven vertical and seven tackled?

A four-word word with the number "eight":

six of one and half a dozen of the other

Pay close attention/stay alert

Be endowed with great/extraordinary talents

Awesome everywhere.

Try to please all parties and get rid of any embarrassing situation.

Nonsense?

Exquisite in all directions?

A four-word word with the number "nine":

Jiuquan smiles?

Nine continents and four seas?

result

Three towns and nine fierce?

Three turns and nine turns?

nine in ten

A four-word word with the number "ten":

Know nine out of ten?

Perfect in every respect/aspect.

Very urgent

Shili guoke pavilion

Chronic pain

Crossroads?

A person should be independent/firm at the age of thirty.

Colorful?

Full of air?

Ask and answer?

15 10?

Other four-character idioms with numbers:

Thousands of turns, once in a blue moon, one in a million, one in a thousand, one in a thousand, one in a thousand, one thousand ways, thousands of dangers, thousands of miles away, beyond redemption, unparalleled in the world, total annihilation, hordes and so on